Eric Mangini's addition to the San Francisco 49ers gives the team a powerhouse offensive staff running 12 men deep, counting head coach Jim Harbaugh.Mangini assumes the title of senior offensive consultant. Paul Wulff, former head coach at Washington State, remains as senior offensive assistant. Greg Roman returns as offensive coordinator after being mentioned (but never interviewed) as a potential head coaching candidate during the 49ers' run to the Super Bowl last season.