Bucs head coach Dirk Koetter discussed the decision in his weekly, exclusive "Koetter's Korner" interview.
Winston initially sustained an AC joint sprain in his right shoulder in a 38-33 loss at the Arizona Cardinals on October 15. Winston gave a freakish pregame speech, then left the game with the shoulder injury, then instigated a fight with New Orleans' Marshon Lattimore.
Winston has played through the injury, originally diagnosed as an AC joint sprain, the past three games.
As quarterback, Ryan Fitzpatrick gets ready to make his first start as a Buccaneer.
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The injury forced him to leave the game. In the game against Arizona, Fitzpatrick went 22-for-32 for 290 yards, three touchdowns and two interceptions while replacing Winston.
Winston's production has also dropped as the injury lingered.
The third quarterback on the Bucs roster, Ryan Griffin, is eligible to come off the team's injured reserve list.
Fitzpatrick, 34, completed 8 of 15 passes for 68 yards and a touchdown in relief of Winston on Sunday.