Wayne Rooney has left his role as head coach of DC United after they "mutually agreed to part ways".The decision was confirmed after DC United were eliminated from MLS play-off contention on Saturday night. "It's the right time," the 37-year-old Rooney said. "I've done everything I can to get this club into the play-offs. It's not a single thing that's happened. It's about timing."Rooney has been linked with a potential move to Birmingham City, who are under American ownership. However, Birmingham are currently on a great run, with Friday's win over West Brom lifting them inside the Championship play-off places. According to The Daily Mail, Rooney is high on Birmingham's list should manager John Eustace leave the club.