QB Steve Young started off with the Los Angeles Express of the USFL in 1984. It was during this time that he became the first pro football player to pass for 300 yards and rush for another 100 yards in a single game. The league was dissolving, so Young signed with Tampa Bay in '85. The following year he was traded to San Francisco to be Joe Montana's backup. He didn’t start, but the times he played for Montana showed his potential. In 1991, he got his chance and made the most of it. Young was the named NFL MVP in '92 and '94, helped the team win Super Bowl XXIX and was named MVP of that game, holds the NFL record for the highest career passer rating (96.8) and won six NFL passing titles.
In 1999, Young was feeling the effects of several concussions. During a game against the Arizona Cardinals, Young was sacked and concussed by Aeneas Williams. With the concussions becoming a persistent problem, Young was forced to retire in 1999. (AP Photo/Paul Sakuma)