49ers’ Kwon Alexander to miss rest of season with torn pec

49ers-kwon-alexander-tackles-buccaneers-oj-howard

Tampa Bay Buccaneers tight end O.J. Howard (80) runs into San Francisco 49ers middle linebacker Kwon Alexander (56) during the first half, Sunday, Sept. 8, 2019, in Tampa, Fla. (Mark LoMoglio/AP)

SANTA CLARA, Calif. — San Francisco 49ers linebacker Kwon Alexander will miss the rest of the season after tearing his pectoral muscle.

The 49ers announced the diagnosis Friday, a day after Alexander got hurt in a victory at Arizona that improved San Francisco’s record to 8-0.

Alexander has been a key part of one of the NFL’s stingiest defences in the first half of the season with his speed allowing him to cover tight ends and running backs when necessary. He has also taken up a leadership role on the unit that will be hard to fill.

This is the second straight year Alexander went down with a significant injury. He tore his ACL last year in Tampa Bay before signing with the Niners as a free agent in March.

Rookie Dre Geenlaw is expected to take Alexander’s spot on the nickel defence with rookie Azeez Al-Shaair and practice squader Elijah Lee in contention to take Greenlaw’s spot in base packages.

When submitting content, please abide by our submission guidelines, and avoid posting profanity, personal attacks or harassment. Should you violate our submissions guidelines, we reserve the right to remove your comments and block your account. Sportsnet reserves the right to close a story’s comment section at any time.