49ers’ Kyle Shanahan reveals 2nd-year DT suffered season-ending patellar tendon tear

Just as prep for the standard season finale wrapped up, injury disaster struck the San Francisco 49ers defensive front once again.

San Francisco 49ers head coach Kyle Shanahan confirmed the brutal news on Tuesday, announcing that second-year defensive tackle Alfred Collins suffered a season-ending patellar tendon tear during practice. The injury drops another heavy blow on a front line already dealing with roster movement and health concerns.

“All I have to talk about is what happened yesterday with injuries with all the guys that were limited,” Shanahan said. “Though the worst one was Alfred Collins. Alfred tore his patellar tendon yesterday so that was a big loss, lost two D-linemen pretty much for the year, after cuts, before the first game. Which has been a huge challenge.”

Kyle Shanahan shares 49ers defensive tackle Alfred Collins tore his patellar tendon in practice and is out for the season pic.twitter.com/mcqkIgcU0y

— 49ers on NBCS (@NBCS49ers) September 9, 2026

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