C.J. Beathard will be the third quarterback on the depth chart.
"The coaches have notified us," Mullens said. "I will serve as the backup. That doesn't really change my mindset. I've just got to take one day at a time, and all three of us will continue to push each other and make each other better in practice and in the game."
The decision should not come as a surprise to fans. Mullens started the 49ers' final eight games of last season after Beathard's five starts. The two competed this offseason and during the preseason for the backup quarterback job behind Garoppolo and both were kept on San Francisco's 53-player roster.
Mullens believes both he and Beathard are better quarterbacks because of the offseason competition.
The decision had already been made by the end of last week but Shanahan said he wanted to wait until Monday to inform his quarterbacks before announcing it to the media. The discussion actually came on Friday, the same day Mullens was with his wife, Haleigh, as the happy couple became first-time parents with the birth of their son, Luke Clayton Mullens.
"Pretty cool week, very thankful," Mullens said while adding that the baby is healthy and happy.
The 49ers signed Mullens as an undrafted free agent out of Southern Miss in 2017. He completed 176-of-274 attempts (64.2 percent) for 2,277 yards with 13 touchdowns and 10 interceptions through eight starts with the 49ers in 2018.
Mullens appeared in each of San Francisco's four preseason games this year. He completed 22-of-34 passes for 229 yards with two touchdowns, an interception, and a passer rating of 91.4 in those games.
Related News
More San Francisco 49ers News
-
49ers' Kyle Shanahan explains Brock Purdy's remarkable success in Seattle
San Francisco 49ers quarterback Brock Purdy earned his first career road start in 2022 with a 21-13 win over the Seattle Seahawks at Lumen Field. Since then, he has played three additional games in one of the loudest and most challenging environments in the NFL — and won all... -
How Eric Kendricks became an instant force multiplier for the 49ers defense
When a veteran signs with an NFL team late in the season, it's often as a break-glass-in-case-of-emergency option—a short-term fix after injuries pile up. That may have been the initial expectation when the San Francisco 49ers signed linebacker Eric Kendricks in November.... -
Loss of George Kittle latest heartbreaker in 49ers' injury-plagued season
Just how much must San Francisco 49ers fans endure this season? The sight of All-Pro tight end George Kittle making a catch, going down near the sideline, and immediately grabbing his leg was the latest gut punch for the 49ers in what has been a brutal, injury-plagued 2025... -
49ers vs. Eagles injury updates: George Kittle suffers Achilles injury
The San Francisco 49ers are facing the Philadelphia Eagles at Lincoln Financial Field in a Wild Card playoff game. Below are the latest in-game injury updates for the 49ers. This article will be updated in real time as new information becomes available. Players are listed in...