The New Orleans Saints say veteran quarterback Derek Carr has decided to retire because of a labral tear in his right shoulder and “significant degenerative changes” to his rotator cuff.

The Saints aren't the only team with uncertainty at quarterback, though. The Pittsburgh Steelers await Aaron Rodgers' decision on whether he will continue to play or retire. The Cleveland Browns and Indianapolis Colts have wide-open quarterback competitions.

The Saints drafted Tyler Shough out of Louisville in the second round of this year's draft, and they picked Spencer Rattler out of South Carolina last year. The latter made six starts last year after Carr was knocked out for the season with a fractured non-throwing hand.