What happened: Coach Kyle Shanahan confirmed the diagnosis following San Francisco's 38-17 win Sunday.
Why it matters: The injury leaves the 49ers with a defensive tackle spot to fill for the rest of the season. Halton was their fourth-round pick, 107th overall, in the 2026 NFL Draft.
By the numbers: Halton has 15 tackles and two sacks in 2026 through seven games.
What to watch: San Francisco's next roster move will indicate how it plans to cover his absence.