San Francisco 49ers' Nick Bosa has torn ACL, done for season, sources tell ESPN

SAN FRANCISCO -- San Francisco 49ers Pro Bowl antiaircraft extremity Nick Bosa suffered a torn ACL during Sunday's triumph against Arizona and volition request season-ending surgery, sources told ESPN's Adam Schefter connected Monday.

Testing revealed a cleanable teardrop successful his close knee, sources told ESPN.

San Francisco 49ers' Nick Bosa walks disconnected the tract during the archetypal fractional of an NFL shot crippled against the Arizona Cardinals, Sunday, Sept. 21, 2025, successful Santa Clara, Calif.

AP Photo/Godofredo A. Vásquez

Bosa near Sunday's 16-15 triumph with astir a infinitesimal near successful the archetypal quarter. On the play, Bosa was rushing Cardinals backmost Kyler Murray from the near broadside and engaged with near tackle Kelvin Beachum erstwhile Cardinals defender Evan Brown came implicit for the treble squad and knocked Bosa to the ground.

Bosa's close genu appeared to crook awkwardly arsenic helium went down and Murray's walk fell incomplete. Bosa walked dilatory to the sideline, wherever the Niners' grooming unit began treating his wounded portion Bosa was connected his back.

After a fewer moments, Bosa walked to the bluish aesculapian tent, wherever helium remained for astir 5 minutes earlier emerging. He spent the adjacent mates of minutes doing immoderate stretching and precocious knees but yet made his mode to the locker country portion giving a thumbs down.

He had 2 sacks, 8 pressures, 15 tackles and a 21.9% walk unreserved triumph complaint successful the archetypal 2 weeks of the season.

Bosa's wounded was the latest for a Niners squad that has been plagued with them truthful acold this season. The 49ers mislaid choky extremity George Kittle (hamstring) and backmost Brock Purdy (toe) successful Week 1 and past wideout Jauan Jennings (shoulder, ankle) and near defender Ben Bartch (ankle) successful Week 2.

ESPN's Nick Wagoner contributed to this report.