Chicago Bears cornerback Charles Tillman underwent surgery Tuesday to repair his torn right triceps.
The Bears put Tillman on injured reserve on Sept. 15.
Tillman sustained the injury in the third quarter of the Bears' 28-20 victory over the San Francisco 49ers on Sept. 14. He tore a triceps muscle in the same arm last November and missed the last eight games of the 2013 season. The Bears used the short-term IR designation on Tillman last season for the injury.
Tillman leads the NFL with 42 forced fumbles since 2003.
- Sarah Barshop