49ers starting QB Jimmy Garoppolo sprained his ankle in Week 2 and was a bit of a longshot to play just a week later.
This will be Mullens’ second stint as the starter. He took over for Garoppolo in the second half Sunday and completed 8-11 pass attempts for 71 yards, no touchdowns and an interception.
Mullens, 25, wound up signing on with the 49ers as an undrafted free agent out of Southern Miss back in 2017. He was waived coming out of the preseason and later added to their practice squad.
The 49ers brought Mullens back on a futures contract in 2018 only to release him at the start of the regular season. Mullens had a brief stint on their practice squad before being called up following Jimmy Garoppolo‘s season-ending knee injury.
He re-signed as an exclusive rights free agent this past offseason.
In 2018, Mullens appeared in eight games for the 49ers and completed 64.2 percent of his passes for 2,277 yards, 13 touchdowns and 10 interceptions.