Purdy has missed two games with a turf toe injury, but Jones is 2-0 as a starter. On Sunday, Jones aggravated the knee sprain he suffered in training camp, playing with and without a bulky knee brace during a 16-15 comeback win over the Cardinals.

Now in his third act as an NFL quarterback, Jones has already had two opportunities to prove that he has good football left in him. In the process, the 49ers have learned a lot about their No. 2 signal-caller, even as Brock Purdy is poised to return from a toe injury sooner than later.

San Francisco 49ers quarterback Mac Jones shared how star running back Christian McCaffrey provides him confidence in the huddle.

Facing perennial issues keeping key players healthy, the 49ers have two injured quarterbacks entering Week 4. Mac Jones joins Brock

Jones threw an interception with the game tied in the fourth quarter against the Cardinals when he fired a pass downfield to Ricky Pearsall that was picked off by Dadrion Taylor-Demerson. A few minutes later San Francisco took a safety to fall behind, but Jones was able to lead a game-winning drive in the final minutes.

Backup quarterbacks had a big day. Carson Wentz and Marcus Mariota were sharp Sunday in leading their teams to lopsided wins as fill-in starters. Mac Jones overcame a costly turnover and engineered a game-winning final drive.

We break down the fantasy football outlook of Mac Jones ahead of the 49ers’ Week 3 matchup against the Cardinals.

They needed every last second to get it done, but thanks to a game-winning field goal from kicker Eddy Pineiro as time ran out, the San Francisco 49ers moved to 3-0 on Sunday with a 16-15 win over the Arizona Cardinals in their home opener at Levi's Stadium in Santa...