Los Angeles Chargers quarterback Justin Herbert (10) warms up before an NFL football game, Monday, Sept. 15, 2025, in Las Vegas. (AP Photo/David Becker)

EL SEGUNDO, Calif. (AP) — Linebacker Khalil Mack will go on injured reserve with an elbow injury, leaving the undefeated Los Angeles Chargers without one of their top defenders for at least the next four games.

Mack dislocated his left elbow in the first quarter of a win against Las Vegas on Sept. 15.

“It’s one of the toughest things I’ve ever seen. I was staring right at it,” coach Jim Harbaugh said on Sept. 17. “I’ve had an arm injury, too, and those are painful. I have a new level of respect for the toughness of Khalil Mack.”

The Chargers have depth at Mack’s position, with Bud Dupree and Tui Tuipulotu figuring to contribute. The edge rushers combined for 14 1/2 sacks last season, although neither has one so far this season.

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