Check out this story.
Dan Wetzel from Yahoo! Sports wrote an amazing column on McCoy and his injury. There are a lot of people who say that McCoy should have fought through it. There is no doubt in my mind that McCoy simply could not do it. Not that he couldn't handle the pain, he just had no sensation in his arm. Part of his story...
"So Colt gripped the ball, stared at his dad and thought, “It’s just a simple throw.” He threw. The ball went soft and wide. Everyone grimaced. “Give it to me again,” Colt demanded. Brad got the ball and gave it back to his son. The next throw was the same, bouncing harmlessly away. “Give it to me again,” Colt said, again. Brad did.
It was the same. It was over. Colt couldn’t throw it 7 yards to his own father. “My arm was dead,” he said. The dad hugged his son. The son broke down and cried."