diff --git a/apps/api/src/domain/driver/DriverProviders.ts b/apps/api/src/domain/driver/DriverProviders.ts
index 18bc1ba4a..2409e75cd 100644
--- a/apps/api/src/domain/driver/DriverProviders.ts
+++ b/apps/api/src/domain/driver/DriverProviders.ts
@@ -149,24 +149,25 @@ export const DriverProviders: Provider[] = [
       driverStatsService: IDriverStatsService,
       imageService: IImageServicePort,
       logger: Logger,
-    ) => new GetDriversLeaderboardUseCase(driverRepo, rankingService, driverStatsService, (driverId: string) => Promise.resolve(imageService.getDriverAvatar(driverId)), logger),
-    inject: [DRIVER_REPOSITORY_TOKEN, RANKING_SERVICE_TOKEN, DRIVER_STATS_SERVICE_TOKEN, IMAGE_SERVICE_PORT_TOKEN, LOGGER_TOKEN],
+      output: UseCaseOutputPort<unknown>,
+    ) => new GetDriversLeaderboardUseCase(driverRepo, rankingService, driverStatsService, (driverId: string) => Promise.resolve(imageService.getDriverAvatar(driverId)), logger, output),
+    inject: [DRIVER_REPOSITORY_TOKEN, RANKING_SERVICE_TOKEN, DRIVER_STATS_SERVICE_TOKEN, IMAGE_SERVICE_PORT_TOKEN, LOGGER_TOKEN, GET_DRIVERS_LEADERBOARD_OUTPUT_PORT_TOKEN],
   },
   {
     provide: GET_TOTAL_DRIVERS_USE_CASE_TOKEN,
-    useFactory: (driverRepo: IDriverRepository) => new GetTotalDriversUseCase(driverRepo),
-    inject: [DRIVER_REPOSITORY_TOKEN],
+    useFactory: (driverRepo: IDriverRepository, output: UseCaseOutputPort<unknown>) => new GetTotalDriversUseCase(driverRepo, output),
+    inject: [DRIVER_REPOSITORY_TOKEN, GET_TOTAL_DRIVERS_OUTPUT_PORT_TOKEN],
   },
   {
     provide: COMPLETE_DRIVER_ONBOARDING_USE_CASE_TOKEN,
-    useFactory: (driverRepo: IDriverRepository, logger: Logger) => new CompleteDriverOnboardingUseCase(driverRepo, logger),
-    inject: [DRIVER_REPOSITORY_TOKEN, LOGGER_TOKEN],
+    useFactory: (driverRepo: IDriverRepository, logger: Logger, output: UseCaseOutputPort<unknown>) => new CompleteDriverOnboardingUseCase(driverRepo, logger, output),
+    inject: [DRIVER_REPOSITORY_TOKEN, LOGGER_TOKEN, COMPLETE_DRIVER_ONBOARDING_OUTPUT_PORT_TOKEN],
   },
   {
     provide: IS_DRIVER_REGISTERED_FOR_RACE_USE_CASE_TOKEN,
-    useFactory: (registrationRepo: IRaceRegistrationRepository, logger: Logger) =>
-      new IsDriverRegisteredForRaceUseCase(registrationRepo, logger),
-    inject: [RACE_REGISTRATION_REPOSITORY_TOKEN, LOGGER_TOKEN],
+    useFactory: (registrationRepo: IRaceRegistrationRepository, logger: Logger, output: UseCaseOutputPort<unknown>) =>
+      new IsDriverRegisteredForRaceUseCase(registrationRepo, logger, output),
+    inject: [RACE_REGISTRATION_REPOSITORY_TOKEN, LOGGER_TOKEN, IS_DRIVER_REGISTERED_FOR_RACE_OUTPUT_PORT_TOKEN],
   },
   {
     provide: UPDATE_DRIVER_PROFILE_USE_CASE_TOKEN,
diff --git a/apps/api/src/domain/driver/DriverService.ts b/apps/api/src/domain/driver/DriverService.ts
index b95d7a075..606fb86a2 100644
--- a/apps/api/src/domain/driver/DriverService.ts
+++ b/apps/api/src/domain/driver/DriverService.ts
@@ -1,4 +1,5 @@
 import { Inject, Injectable } from '@nestjs/common';
+import { Result } from '@core/shared/application/Result';
 import { CompleteOnboardingInputDTO } from './dtos/CompleteOnboardingInputDTO';
 import { CompleteOnboardingOutputDTO } from './dtos/CompleteOnboardingOutputDTO';
 import { DriverRegistrationStatusDTO } from './dtos/DriverRegistrationStatusDTO';
@@ -69,14 +70,20 @@ export class DriverService {
   async getDriversLeaderboard(): Promise<DriversLeaderboardDTO> {
     this.logger.debug('[DriverService] Fetching drivers leaderboard.');
 
-    await this.getDriversLeaderboardUseCase.execute({});
+    const result = await this.getDriversLeaderboardUseCase.execute({});
+    if (result.isErr()) {
+      throw new Error(result.unwrapErr().details.message);
+    }
     return this.driversLeaderboardPresenter.getResponseModel();
   }
 
   async getTotalDrivers(): Promise<DriverStatsDTO> {
     this.logger.debug('[DriverService] Fetching total drivers count.');
 
-    await this.getTotalDriversUseCase.execute({});
+    const result = await this.getTotalDriversUseCase.execute({});
+    if (result.isErr()) {
+      throw new Error(result.unwrapErr().details.message);
+    }
     return this.driverStatsPresenter.getResponseModel();
   }
 
@@ -86,7 +93,7 @@ export class DriverService {
   ): Promise<CompleteOnboardingOutputDTO> {
     this.logger.debug('Completing onboarding for user:', userId);
 
-    await this.completeDriverOnboardingUseCase.execute({
+    const result = await this.completeDriverOnboardingUseCase.execute({
       userId,
       firstName: input.firstName,
       lastName: input.lastName,
@@ -95,6 +102,9 @@ export class DriverService {
       ...(input.bio !== undefined ? { bio: input.bio } : {}),
     });
 
+    if (result.isErr()) {
+      throw new Error(result.unwrapErr().details.message);
+    }
     return this.completeOnboardingPresenter.getResponseModel();
   }
 
@@ -103,18 +113,22 @@ export class DriverService {
   ): Promise<DriverRegistrationStatusDTO> {
     this.logger.debug('Checking driver registration status:', query);
 
-    await this.isDriverRegisteredForRaceUseCase.execute({
+    const result = await this.isDriverRegisteredForRaceUseCase.execute({
       raceId: query.raceId,
       driverId: query.driverId,
     });
 
+    if (result.isErr()) {
+      throw new Error(result.unwrapErr().details.message);
+    }
     return this.driverRegistrationStatusPresenter.getResponseModel();
   }
 
   async getCurrentDriver(userId: string): Promise<GetDriverOutputDTO | null> {
     this.logger.debug(`[DriverService] Fetching current driver for userId: ${userId}`);
 
-    await this.driverRepository.findById(userId);
+    const driver = await this.driverRepository.findById(userId);
+    this.driverPresenter.present(Result.ok(driver));
     return this.driverPresenter.getResponseModel();
   }
 
@@ -136,14 +150,18 @@ export class DriverService {
   async getDriver(driverId: string): Promise<GetDriverOutputDTO | null> {
     this.logger.debug(`[DriverService] Fetching driver for driverId: ${driverId}`);
 
-    await this.driverRepository.findById(driverId);
+    const driver = await this.driverRepository.findById(driverId);
+    this.driverPresenter.present(Result.ok(driver));
     return this.driverPresenter.getResponseModel();
   }
 
   async getDriverProfile(driverId: string): Promise<GetDriverProfileOutputDTO> {
     this.logger.debug(`[DriverService] Fetching driver profile for driverId: ${driverId}`);
 
-    await this.getProfileOverviewUseCase.execute({ driverId });
+    const result = await this.getProfileOverviewUseCase.execute({ driverId });
+    if (result.isErr()) {
+      throw new Error(result.unwrapErr().details.message);
+    }
     return this.driverProfilePresenter.getResponseModel();
   }
 }
\ No newline at end of file
diff --git a/apps/api/src/domain/driver/presenters/CompleteOnboardingPresenter.ts b/apps/api/src/domain/driver/presenters/CompleteOnboardingPresenter.ts
index 7d9fd11d2..127b2ebe0 100644
--- a/apps/api/src/domain/driver/presenters/CompleteOnboardingPresenter.ts
+++ b/apps/api/src/domain/driver/presenters/CompleteOnboardingPresenter.ts
@@ -1,17 +1,10 @@
-import { Result } from '@core/shared/application/Result';
 import type { CompleteOnboardingOutputDTO } from '../dtos/CompleteOnboardingOutputDTO';
+import type { CompleteDriverOnboardingResult } from '@core/racing/application/use-cases/CompleteDriverOnboardingUseCase';
 
 export class CompleteOnboardingPresenter {
   private responseModel: CompleteOnboardingOutputDTO | null = null;
 
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  present(result: Result<any, any>): void {
-    if (result.isErr()) {
-      const error = result.unwrapErr();
-      throw new Error(error.details?.message ?? 'Failed to complete onboarding');
-    }
-
-    const data = result.unwrap();
+  present(data: CompleteDriverOnboardingResult): void {
     this.responseModel = {
       success: true,
       driverId: data.driver.id,
diff --git a/apps/api/src/domain/driver/presenters/DriversLeaderboardPresenter.test.ts b/apps/api/src/domain/driver/presenters/DriversLeaderboardPresenter.test.ts
index e872f196c..92fbc3346 100644
--- a/apps/api/src/domain/driver/presenters/DriversLeaderboardPresenter.test.ts
+++ b/apps/api/src/domain/driver/presenters/DriversLeaderboardPresenter.test.ts
@@ -1,5 +1,4 @@
 import { GetDriversLeaderboardResult } from '@core/racing/application/use-cases/GetDriversLeaderboardUseCase';
-import { Result } from '@core/shared/application/Result';
 import { beforeEach, describe, expect, it } from 'vitest';
 import { DriversLeaderboardPresenter } from './DriversLeaderboardPresenter';
 import type { Driver } from '@core/racing/domain/entities/Driver';
@@ -54,9 +53,7 @@ describe('DriversLeaderboardPresenter', () => {
         activeCount: 2,
       };
 
-      const result = Result.ok<GetDriversLeaderboardResult, never>(coreResult);
-
-      presenter.present(result);
+      presenter.present(coreResult);
 
       const output = presenter.getResponseModel();
 
diff --git a/apps/api/src/domain/driver/presenters/DriversLeaderboardPresenter.ts b/apps/api/src/domain/driver/presenters/DriversLeaderboardPresenter.ts
index efb3fc21c..09225e756 100644
--- a/apps/api/src/domain/driver/presenters/DriversLeaderboardPresenter.ts
+++ b/apps/api/src/domain/driver/presenters/DriversLeaderboardPresenter.ts
@@ -1,21 +1,12 @@
 import { DriversLeaderboardDTO } from '../dtos/DriversLeaderboardDTO';
-import { Result } from '@core/shared/application/Result';
-import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
 import type {
   GetDriversLeaderboardResult,
-  GetDriversLeaderboardErrorCode,
 } from '@core/racing/application/use-cases/GetDriversLeaderboardUseCase';
 
 export class DriversLeaderboardPresenter {
   private responseModel: DriversLeaderboardDTO | null = null;
 
-  present(result: Result<GetDriversLeaderboardResult, ApplicationErrorCode<GetDriversLeaderboardErrorCode, { message: string }>>): void {
-    if (result.isErr()) {
-      const error = result.unwrapErr();
-      throw new Error(error.details?.message ?? 'Failed to get drivers leaderboard');
-    }
-
-    const data = result.unwrap();
+  present(data: GetDriversLeaderboardResult): void {
     this.responseModel = {
       drivers: data.items.map(item => ({
         id: item.driver.id,
diff --git a/core/racing/application/use-cases/CompleteDriverOnboardingUseCase.ts b/core/racing/application/use-cases/CompleteDriverOnboardingUseCase.ts
index 48bd9e57c..54656aaa2 100644
--- a/core/racing/application/use-cases/CompleteDriverOnboardingUseCase.ts
+++ b/core/racing/application/use-cases/CompleteDriverOnboardingUseCase.ts
@@ -2,7 +2,7 @@ import type { IDriverRepository } from '../../domain/repositories/IDriverReposit
 import { Driver } from '../../domain/entities/Driver';
 import { Result } from '@core/shared/application/Result';
 import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
-import type { UseCase } from '@core/shared/application';
+import type { UseCase, UseCaseOutputPort } from '@core/shared/application';
 import type { Logger } from '@core/shared/application/Logger';
 
 export interface CompleteDriverOnboardingInput {
@@ -30,15 +30,16 @@ export type CompleteDriverOnboardingApplicationError = ApplicationErrorCode<
 /**
  * Use Case for completing driver onboarding.
  */
-export class CompleteDriverOnboardingUseCase implements UseCase<CompleteDriverOnboardingInput, CompleteDriverOnboardingResult, CompleteDriverOnboardingErrorCode> {
+export class CompleteDriverOnboardingUseCase implements UseCase<CompleteDriverOnboardingInput, void, CompleteDriverOnboardingErrorCode> {
   constructor(
     private readonly driverRepository: IDriverRepository,
     private readonly logger: Logger,
+    private readonly output: UseCaseOutputPort<CompleteDriverOnboardingResult>,
   ) {}
 
   async execute(
     input: CompleteDriverOnboardingInput,
-  ): Promise<Result<CompleteDriverOnboardingResult, CompleteDriverOnboardingApplicationError>> {
+  ): Promise<Result<void, CompleteDriverOnboardingApplicationError>> {
     try {
       const existing = await this.driverRepository.findById(input.userId);
       if (existing) {
@@ -59,7 +60,8 @@ export class CompleteDriverOnboardingUseCase implements UseCase<CompleteDriverOn
       await this.driverRepository.create(driver);
 
       const result: CompleteDriverOnboardingResult = { driver };
-      return Result.ok(result);
+      this.output.present(result);
+      return Result.ok(void 0);
     } catch (error) {
       const err = error instanceof Error ? error : new Error('Unknown error');
 
diff --git a/core/racing/application/use-cases/GetDriversLeaderboardUseCase.ts b/core/racing/application/use-cases/GetDriversLeaderboardUseCase.ts
index 5d756c212..4b2ea2c94 100644
--- a/core/racing/application/use-cases/GetDriversLeaderboardUseCase.ts
+++ b/core/racing/application/use-cases/GetDriversLeaderboardUseCase.ts
@@ -1,4 +1,4 @@
-import type { Logger, UseCase } from '@core/shared/application';
+import type { Logger, UseCase, UseCaseOutputPort } from '@core/shared/application';
 import { Result } from '@core/shared/application/Result';
 import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
 import type { Driver } from '../../domain/entities/Driver';
@@ -42,20 +42,21 @@ export type GetDriversLeaderboardErrorCode =
  * Use Case for retrieving driver leaderboard data.
  * Returns a Result containing the domain leaderboard model.
  */
-export class GetDriversLeaderboardUseCase implements UseCase<GetDriversLeaderboardInput, GetDriversLeaderboardResult, GetDriversLeaderboardErrorCode> {
+export class GetDriversLeaderboardUseCase implements UseCase<GetDriversLeaderboardInput, void, GetDriversLeaderboardErrorCode> {
   constructor(
     private readonly driverRepository: IDriverRepository,
     private readonly rankingService: IRankingService,
     private readonly driverStatsService: IDriverStatsService,
     private readonly getDriverAvatar: (driverId: string) => Promise<string | undefined>,
     private readonly logger: Logger,
+    private readonly output: UseCaseOutputPort<GetDriversLeaderboardResult>,
   ) {}
 
   async execute(
     input: GetDriversLeaderboardInput,
   ): Promise<
     Result<
-      GetDriversLeaderboardResult,
+      void,
       ApplicationErrorCode<GetDriversLeaderboardErrorCode, { message: string }>
     >
   > {
@@ -105,7 +106,9 @@ export class GetDriversLeaderboardUseCase implements UseCase<GetDriversLeaderboa
 
       this.logger.debug('Successfully computed drivers leaderboard');
 
-      return Result.ok(result);
+      this.output.present(result);
+
+      return Result.ok(void 0);
     } catch (error) {
       const err = error instanceof Error ? error : new Error(String(error));
 
diff --git a/core/racing/application/use-cases/GetTotalDriversUseCase.ts b/core/racing/application/use-cases/GetTotalDriversUseCase.ts
index 1a39ebd9f..f807a1dc8 100644
--- a/core/racing/application/use-cases/GetTotalDriversUseCase.ts
+++ b/core/racing/application/use-cases/GetTotalDriversUseCase.ts
@@ -1,4 +1,4 @@
-import type { UseCase } from '@core/shared/application';
+import type { UseCase, UseCaseOutputPort } from '@core/shared/application';
 import { Result } from '@core/shared/application/Result';
 import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
 import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
@@ -17,20 +17,23 @@ export type GetTotalDriversResult = {
 
 export type GetTotalDriversErrorCode = 'REPOSITORY_ERROR';
 
-export class GetTotalDriversUseCase implements UseCase<GetTotalDriversInput, GetTotalDriversResult, GetTotalDriversErrorCode> {
+export class GetTotalDriversUseCase implements UseCase<GetTotalDriversInput, void, GetTotalDriversErrorCode> {
   constructor(
     private readonly driverRepository: IDriverRepository,
+    private readonly output: UseCaseOutputPort<GetTotalDriversResult>,
   ) {}
 
   async execute(
     _input: GetTotalDriversInput,
-  ): Promise<Result<GetTotalDriversResult, ApplicationErrorCode<GetTotalDriversErrorCode, { message: string }>>> {
+  ): Promise<Result<void, ApplicationErrorCode<GetTotalDriversErrorCode, { message: string }>>> {
     void _input;
     try {
       const drivers = await this.driverRepository.findAll();
       const result: GetTotalDriversResult = { totalDrivers: drivers.length };
 
-      return Result.ok(result);
+      this.output.present(result);
+
+      return Result.ok(void 0);
     } catch (error) {
       const message = (error as Error | undefined)?.message ?? 'Failed to compute total drivers';
 
diff --git a/core/racing/application/use-cases/IsDriverRegisteredForRaceUseCase.ts b/core/racing/application/use-cases/IsDriverRegisteredForRaceUseCase.ts
index c2b3afe4d..60bffeee7 100644
--- a/core/racing/application/use-cases/IsDriverRegisteredForRaceUseCase.ts
+++ b/core/racing/application/use-cases/IsDriverRegisteredForRaceUseCase.ts
@@ -1,5 +1,5 @@
 import type { IRaceRegistrationRepository } from '../../domain/repositories/IRaceRegistrationRepository';
-import type { Logger, UseCase } from '@core/shared/application';
+import type { Logger, UseCase, UseCaseOutputPort } from '@core/shared/application';
 import { Result } from '@core/shared/application/Result';
 import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
 
@@ -26,20 +26,22 @@ export type IsDriverRegisteredForRaceResult = {
  *
  * Checks if a driver is registered for a specific race.
  */
-export class IsDriverRegisteredForRaceUseCase implements UseCase<IsDriverRegisteredForRaceInput, IsDriverRegisteredForRaceResult, IsDriverRegisteredForRaceErrorCode> {
+export class IsDriverRegisteredForRaceUseCase implements UseCase<IsDriverRegisteredForRaceInput, void, IsDriverRegisteredForRaceErrorCode> {
   constructor(
     private readonly registrationRepository: IRaceRegistrationRepository,
     private readonly logger: Logger,
+    private readonly output: UseCaseOutputPort<IsDriverRegisteredForRaceResult>,
   ) {}
 
-  async execute(params: IsDriverRegisteredForRaceInput): Promise<Result<IsDriverRegisteredForRaceResult, IsDriverRegisteredForRaceApplicationError>> {
+  async execute(params: IsDriverRegisteredForRaceInput): Promise<Result<void, IsDriverRegisteredForRaceApplicationError>> {
     this.logger.debug('IsDriverRegisteredForRaceUseCase:execute', { params });
     const { raceId, driverId } = params;
 
     try {
       const isRegistered = await this.registrationRepository.isRegistered(raceId, driverId);
 
-      return Result.ok({ isRegistered, raceId, driverId });
+      this.output.present({ isRegistered, raceId, driverId });
+      return Result.ok(void 0);
     } catch (error) {
       this.logger.error(
         'IsDriverRegisteredForRaceUseCase:execution error',