Kevin Curtis
For a minute, we all thought Curtis would be the next great slot receiver. He was actually a 3rd-round pick, so expectations were somewhat high as a rookie. He even scored a 48 out of 50 on the infamous Wonderlic Test. But he had modest numbers with the Rams for four seasons before he exploded with the Eagles in 2007, catching 77 passes for over 1,100 yards.
However, sports hernia surgery kept him out early in the 2008 season. He then missed 12 games in 2009 because of knee surgery and was released the following off-season. During that off-season, Curtis was treated for testicular cancer but managed to find a home with the Dolphins. But he caught just one pass that season, and it would be the last catch of his career despite continued efforts to get another chance in the NFL.