n the spirit of Brett Favre's rumored comeback, there have been many athletes who retired and then returned to star in various sports:

1. Michael Jordan

2. Muhammad Ali

3. Roger Clemens

4. George Mikan

5. Sugar Ray Leonard

6. Mario Lemieux

7. Magic Johnson

8. Bill Walton

9. Ryne Sandberg

10. Reggie White - Mark Nesbitt