Some people feel there is a brewing quarterback controversy for the 49ers between incumbent Brock Purdy and backup Mac Jones.

Not long after nearly losing a fumble on a sack, Mac Jones finally unravels for the 49ers, tossing a deep pick to Jamel Dean that just might seal a home victory for Tampa Bay, which is getting heroic stuff from its own gunslinger in Baker Mayfield:

The 49ers and Buccaneers square off at 3:25 p.m. CDT Sunday at Raymond James Stadium in Tampa, Florida. Alabama’s CBS affiliates are scheduled to televise the game.

San Francisco 49ers quarterback Mac Jones has more at stake heading into Sunday's game against the Tampa Bay Buccaneers.

After Sunday's game, Jones said playing through injuries is in the team's DNA. But you have to wonder how long that DNA is sustainable.

Mac Jones didn’t throw at all in practice Thursday but the hope is he’ll be good to go against Tampa with Brock Purdy likely sidelined again.

Teams across the NFL are dealing with injury concerns at quarterback. Here's the latest for multiple teams this week.

Each Jets loss gets them closer to Justin Fields' replacement. And, hey, Brock Purdy doesn't have to worry about a QB batter, right?

Kindle Vildor picked Jones on a pass intended for Kendrick Bourne, and the defensive back returned it 13 yards on the San Francisco 12. Bourne blamed himself for the interception for not adjusting his route as Jones expected. Two Rachaad White runs later, the Bucs had a 7-0 lead. The Bucs punted on their first drive.

Schefter: 49ers’ Jones, Jennings expected to play vs. Bucs; Pearsall, Purdy updates “Jones has been managing knee and oblique injuries, while Jennings has been recovering from ankle and rib issues. Their availability gives the 49ers’ offense a much-needed boost as they look to improve on their 4-1 record.”