 In 2011, Jim Harbaugh became head coach of the 49ers and Greg Roman became the offensive coordinator for the team.They praised Walker's skill set and used him a number of different ways in the West Coast Offense, including different receiver spots, backup fullback, and even as an alternative kickoff returner and gunner on special teams, attributes that earned him the nickname of "The Swiss Army Knife" within the team.In the 2011 season, Walker recorded 19 receptions for 198 yards and three touchdowns as the 49ers finished with a 13–3 record.