Stafford is just...it's not just his arm talent that makes him great. He's legitimately one of the toughest (both physically and mentally) football players I've seen in person, if not the toughest. He will play through damn near everything, he got nailed a lot in Detroit and kept getting up and taking shots down the field.
Injured ribs? No biggie. Fractured finger on his throwing hand? Still played through that. Separated throwing shoulder? So what? Back injuries? Yeah, what about them? Finger dislocation and torn ligaments on his throwing hand? Didn't miss shit. Multiple ankle sprains? Psh, whatever.
The guy is the fucking Terminator: he will not go down to anything you throw at him, and he will get up, fired up, and lead a game-winning drive.