Biggest 'what if' athletes of all time

Associated Press
File - In this Sept. 29, 2008, file photo, Portland Trail Blazers center Greg Oden reacts while posing for a photograph during NBA basketball media day, in Portland, Ore. The Trail Blazers have been shaken by the demise of the trio many had once hoped would take the team to an NBA championship. (AP Photo/Rick Bowmer, File)

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Grant Hill's retirement got us to thinking about other athletes whose careers were cut short or hampered by injury. While this isn't the definitive list of stifled greatness, we came up with some pretty big names. Who else should be on the list?

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