Parys Haralson suffered a torn left triceps Aug. 26 in Denver and had surgery last week to repair the tear, a league source said. The 49ers placed Haralson on injured reserve Monday, ending his season. Jim Harbaugh confirmed the surgery this morning on KNBR radio.
In reviewing the Denver game, Haralson appears to get hurt on an innocuous-looking running play in the second quarter. He is engaged with tight end Joe Dreesen, suddenly lets up, looks at his arm and runs off the field.
To replace Haralson, who is only one of three outside linebackers on the team, the 49ers signed 12-year veteran Clark Haggans. He is scheduled to have a hearing Wednesday with league officials that will determine whether he'll be suspended this season over a DUI conviction from 2011.
-- Matt Barrows