Hall of Fame quarterback Warren Moon was diagnosed with six concussions during his 23-year professional career in the CFL and NFL. In fact, there are still 35 minutes of a Pittsburgh Steelers game a decade ago that he can't recall after he suffered a concussion.Moon, a national spokesman for the Sports Concussion Institute in Los Angeles, is thankful that Florida quarterback Tim Tebow's recovery from his concussion is being closely monitored. Tebow, injured Sept. 26 against Kentucky, returned to practice on a limited basis but still has not been cleared to play in Saturday's game at No. 4 LSU.
"They have so many different ways now how to measure when to put a player back on the field," Moon told FanHouse.

NCAA record-setting quarterback
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