Career years: 1995-2002
Team(s): Denver Broncos
Career stats: 7,607 rushing yards, 4.6 YPC, 169 receptions, 1,280 receiving yards, 65 total TDs
Accolades: NFL MVP (1998), 2x Super Bowl champion (XXXII, XXXIII), 2x AP NFL Offensive Player of the Year (1996, 1998), 3x Pro Bowler (1996-1998), 1998 Super Bowl MVP
Reason for fall-off: Injuries

Injuries really can change the entire view of a career. Terrell Davis amassed huge numbers in a three-year stretch from 1996-1998. He ran for 49 touchdowns in those three seasons. He also amassed a slew of awards including the 1998 regular season and Super Bowl MVPs. Numerous knee and leg Injuries eventually sapped Davis of many of his abilities. He only played 17 of a possible 48 regular season games. Davis would unfortunately retire after only seven seasons in the NFL. Why couldn't platelet-rich plasma therapy a.k.a. the Kobe treatment be available just a decade earlier?!