Steve Young – San Francisco 49ers
Steve Young is considered by many a NFL legend, earning the title NFL’s Most Valuable Player twice and MVP Super Bowl XXIX. His 43 career rushing touchdowns rank second among quarterbacks and his 4,239 rushing yards rank third of all time. However his Hall of Fame career was constantly plagued with severe concussions and just before the 1999 season, Young suffered seven head injuries and when he sustained his eighth, that was the finish line.
T.J. Ford – San Antonio Spurs
T.J. Ford earned many top basketball accolades when he was in high school and college, so when he was drafted eighth in the 2003 NBA draft by the Milwaukee Bucks, he was well on his way. Then during his rookie season, Ford sustained a contusion of the spinal cord, and missed the entire 2004–05. Later he would make a full recovery and return to the court, but he was never the same player and officially retired in 2012.