SANTA CLARA — Brandon Allen prepared as if he was the 49ers’ starting quarterback all week, but the reality didn’t hit home until Friday, when Brock Purdy again missed practice.
“I know he had a plan for his shoulder all week, rest it a little bit on Wednesday and we’d split reps,” Allen said of Purdy. “I think the plan Thursday was to come out and practice. I guess in warmups it just wasn’t feeling right. I found out (Friday).”
Allen, a 32-year-old veteran in his ninth season, will start Sunday when the 49ers (5-5) visit the Green Bay Packers (7-3) at Lambeau Field.
Purdy was ruled out with a shoulder injury sustained in a 20-17 loss to Seattle, the first time he has missed a start because of injury after 31 regular-season and six postseason starts.
Here are five things to know about Allen:
1. Arkansas roots
The Fayetteville, Arkansas native’s father Bobby spent more than 20 years as an Arkansas assistant coach. After a redshirt season in 2011, Allen played in 42 games with 38 starts for the Razorbacks. As a senior, Allen completed 57.4 percent of his passes for 3,440 yards, 30 touchdowns and eight interceptions as Arkansas went 8-5. His brother Austin took over as the Arkansas quarterback. In his ninth season, only Joe Ferguson (11 seasons) of the Buffalo Bills has more time in the NFL among Arkansas quarterbacks.
2. Professional route
Drafted in the sixth round by the Jacksonville Jaguars, Allen spent his rookie season behind Blake Bortles and Chad Henne as a third-string quarterback and did not play. He was claimed off waivers by the Los Angeles Rams in 2017 and played behind Jared Goff and Sean Mannion before being signed by the Denver Broncos in 2019. Allen won his first start against Cleveland 24-19 in Week 9 of that season, passing for 193 yards and two touchdowns. Allen signed with Cincinnati in 2020, spent time on the practice squad and was promoted to the active roster in November. Subbing for Joe Burrow, Allen had his career-best game, passing for 371 yards and two touchdowns in a 37-31 win. Allen is 2-7 as an NFL starter with 1,611 yards passing, 10 touchdowns, six interceptions and a 78.0 passer rating.
3. Signing with the 49ers
Allen became a 49er on May 8, 2023, signing as a free agent. The 49ers, who up to that point seldom kept a third quarterback on the 53-man roster, kept Allen as a No. 3 all season behind Purdy and Sam Darnold after the previous year’s injuries to Trey Lance, Jimmy Garoppolo, and finally Purdy in the NFC Championship Game. Allen did not take a snap.
4. Installed as No. 2 QB
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Allen signed another one-year contract with the 49ers for one year and $1.21 million (which is more than the $985,000 that Purdy makes on his rookie deal). The 49ers also signed Joshua Dobbs to a one-year, guaranteed $2.35 million contract. Allen and Dobbs competed throughout training camp, with Allen earning the nod from coach Kyle Shanahan.
“You’ve got to make a decision. Usually I don’t want to have to make it,” Shanahan said. “I want it to be that obvious, let it play out. Brandon had the head start just being here. I thought he did some better things in practice.”
5. Familiarity with the system
While in Denver, Allen’s offensive coordinator was Rich Scangarello, who was the quarterbacks coach under Shanahan in 2017-18. In Los Angeles, the head coach was Sean McVay and the offensive coordinator was Matt LaFleur, both of whom run variations of the Shanahan offense. In 2018, Zac Taylor was his quarterbacks coach with the Rams. Taylor, upon being hired as head coach in Cincinnati, signed Allen to back up Burrow.