McCoy's play, Suh walking??

Did McCoy have a impact yesterday minus the first play of the game? I know he wasn't playing in the 4th qtr, was it the hand? This dude cannot have another injured year, not in his contract year. Were already going to overpay to keep him, he has border line "Lived up to his potential"... too many injuries.What affect does the Lion's letting Suh walk have on McCoy's extension?