 He injured his knee during a Week 12 victory against the Kansas City Chiefs and was sidelined for the next two games (Weeks 13–14).Head coach Norv Turner opted to rest Weddle for the playoffs and listed him as inactive for their Week 17 victory against the Washington Redskins.Weddle finished the 2009 season with 82 combined tackles (78 solo), seven passes defensed, two interceptions, 1.5 sacks, and a touchdown in 13 games and 13 starts.