Indianapolis, IN (SportsNetwork.com) - The Indianapolis Colts extended the contract of Robert Mathis for an additional season, the team announced Tuesday.
Mathis, 33, is now under contract through 2016.
The star linebacker was suspended for the first four games after violating the league's performance-enhancing substance policy, then suffered a season-ending torn Achilles tendon while working out on his own.
Mathis led the NFL last season with 19 1/2 sacks.
The Colts also signed cornerback Jalil Brown to the active roster and added wide receiver Chandler Jones and linebacker Rob Ruggiero to the practice squad.
