NFL

Bo Jackson

NFL running back (Los Angeles Raiders) and MLB outfielder; 1985 Heisman Trophy winner

All evidence

3 records, newest first. Strength changes with age and weight class, so check the date and context before you compare.

1. 1986

   • 40-yard dash4.13 s

     Official testPre-draft workout for NFL scouts, age 231986 pre-draft workout at Auburn

     “Jackson recalls that it was an electronically-timed 4.13”

     Bo Knows Speed: The real story behind football's most legendary 40-yard dashSaid in an interview1986low confidence

     Conflict: Ron Wolf remembers a hand-timed 4.16 (separate record). The widely cited 4.12 has no primary source; it was not an official combine time.

   • 40-yard dash4.16 s

     Official testPre-draft workout for NFL scouts, age 231986 pre-draft workout at Auburn

     “He also remembers that it was a hand-timed 4.16”

     Bo Knows Speed: The real story behind football's most legendary 40-yard dashNews report1986low confidence

     'He' is Hall of Fame personnel executive Ron Wolf. Conflicts with Jackson's own 4.13 recollection.

2. 1985

   • 100 m10.39 s

     CompetitionAuburn track, college athleteAuburn track and field

     “he would later run a 10.39 at Auburn”

     Bo Jackson - WikipediaNews report1985medium confidence

     Wikipedia personal bests table lists 10.39 for 100 m; its venue and date entries are garbled. Year is approximate.