San Francisco 49ers

49ers confirm ACL tear for Glenn Dorsey

Atlanta Falcons running back Devonta Freeman (24) runs from San Francisco 49ers nose tackle Glenn Dorsey (90) during an NFL football game in Santa Clara, Calif., Sunday, Nov. 8, 2015.
Atlanta Falcons running back Devonta Freeman (24) runs from San Francisco 49ers nose tackle Glenn Dorsey (90) during an NFL football game in Santa Clara, Calif., Sunday, Nov. 8, 2015. AP

SANTA CLARA -- The 49ers on Sunday feared that veteran defensive lineman Glenn Dorsey tore his ACL in Seattle, and that turned out to be the diagnosis when he was examined Monday. Dorsey will have surgery when the swelling in the knee subsides.

The injury ends the eight-year veteran's season and puts next year in jeopardy as well. The injury occurred on the 49ers' first defensive snap when Dorsey's knee appeared to buckle. Dorsey, 30, missed all of last year when he tore his biceps in training camp. He is signed through the 2016 season.

First-round draft pick Arik Armstead ended up filling in and the former Pleasant Grove High star finished with career highs in snaps (46) and tackles (6). Armstead also added a quarterback hit to his stat line.

Still, Armstead's specialty to this point has been rushing the passer, and several 49ers said the team’s defense missed Dorsey's run-stuffing abilities in Seattle. The Seahawks strung together several long drives, held the ball 15 minutes longer than San Francisco and, most of all, rookie Thomas Rawls ran for 209 yards, more than any rusher ever has gained against the 49ers in franchise history.

“Glenn going down early really hurt us," linebacker NaVorro Bowman said after the game. "I think Rawls wanted to prove himself to the Seattle Seahawks today so he came out there with a little bit of a chip on his shoulder. We have to play better, we have to tackle better and if we do that I think today would’ve been a lot different.”

Matt Barrows: @mattbarrows, read more about the team at sacbee.com/sf49ers.

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