Two factors guaranteed to give NFL teams pause before signing any player: age and injuries.
Minor inconveniences like a criminal record or a history of not producing up to one's potential can be overlooked. But old and/or brittle bones are huge red flags. No matter how many Pro Bowls are on the resume, no matter how impressive the stats—if a player is considered over-the-hill or has missed significant time recently because he's been hurt, his chances of being picked up are slim.
(If the real world worked like the NFL, the work force would have no use for anybody over the age of 35, and secretaries would be taking cortisone shots in the bathroom to play through Carpal Tunnel Syndrome.)
With NFL teams re-assessing their rosters after the first two weeks of preseason games and looking to address some needs, here are 10 unsigned free agents who may stay unsigned due to health concerns: