Favre sprained the sternoclavicular joint in his throwing shoulder after getting crunched by Bills linebacker Arthur Moats on Sunday, an injury that leaves the Minnesota Vikings quarterback unsure of whether he will be able to start his 298th straight regular season game next week.
"If we were talking ankles or elbows, thumbs or something like that, I would probably be a little more up to date on how to deal with it," Favre said after the Vikings beat the Bills, 38-14. "First time in 20 years I have ever done anything like that, so it is kind of surprising."
The SC joint is located where the collarbone meets the breastbone. The more common shoulder injury for athletes is an AC joint sprain. According to Harvard Health Publications, SC joint sprains occur most often "when a driver's chest strikes the steering wheel during an auto accident, or when a person is crushed by an object."
For Favre, it was the latter case.
"He took a pretty good lick in the back as he was coming back and getting ready to throw the ball," said running back Adrian Peterson, who picked up the slack with 107 yards and three TDs. "I know that didn't feel good. I don't know the extent of his injury or what's wrong with him, but obviously for him not to come back in, it must've been painful."
Favre headed to the locker room with athletic trainer Eric Sugarman for an X-ray, which revealed no broken bones and returned to the sideline later in the second quarter.
"Brett is going to push to play Sunday," backup QB Tarvaris Jackson said. "You know the type of player he is. He's played 15,000 games straight now. Probably 15,001 next week."