Dallas Cowboys quarterback Dak Prescott might not throw until Saturday as he deals with a shoulder injury according to Mike Fisher of Sports Illustrated. It's unclear how bad the injury actually is, but Jason Garrett said on Wednesday that he couldn't function very well as a thrower.

“He’s as tough as they come,” said coach Jason Garrett, who revealed on Wednesday that Prescott can not presently “function very well” as a thrower right now. “His physical toughness and mental toughness are on par with anybody I’ve been around, and that’s just what he’s all about. He handles success. He handles adversity. He handles issues as well as anybody.”

An MRI on his shoulder was negative, which is a good sign, but there is still going to be a lot of soreness he is probably going to have to deal with. It would make sense for the team to rest him up until Saturday to try help with the pain, but that could have an impact on the gameplan.

Backup quarterback Cooper Rush said it should take a few days of rest and Prescott should be ready to go.

“You just rest for a few days,” said Rush, who sustained an AC joint injury in college. “And it’s usually fine. That’s how I dealt with it, and that’s how Dak is dealing with it. He’ll be fine.”

If Prescott can't go or is knocked out of the game it will be Rush who is asked to step in and play in the biggest game of the year for the Cowboys.