The Tampa Bay Buccaneers tried out former Oakland Raiders and Seattle Seahawks quarterback Terrelle Pryor, a league source told ESPN's Field Yates.
Bucs quarterback Josh McCown has a significant sprain to his right thumb and likely will miss at least one game, a league source told ESPN Bucs reporter Pat Yasinskas.
McCown has struggled in his first three games with the Buccaneers, passing for 420 yards and four interceptions. McCown suffered the injury in Thursday night's 56-14 loss to the Atlanta Falcons and left the game in the second quarter. McCown said he was unable to grip the ball.
The winless Buccaneers (0-3) play at Pittsburgh next Sunday, and second-year pro Mike Glennon is expected to get the start.
The Seahawks released Pryor in late August. He was acquired by Seattle in April from the Raiders for a seventh-round draft choice.
The Raiders took Pryor in the third round of the supplemental draft in 2011. Pryor was suspended for the first five games by commissioner Roger Goodell, who ruled he must miss the time he would have served under a suspension had he stayed at Ohio State.
Pryor finished the 2013 season having completed 156 of 272 passes for 1,798 yards, seven touchdowns and 11 interceptions, with a passer rating of 69.1. He also rushed for 576 yards on 83 carries.
Information from The Associated Press, ESPN.com Bucs reporter Pat Yasinskas and ESPN.com Seahawks reporter Terry Blount was used in this report.