SANTA CLARA – A 49ers running back set the tone for a San Francisco offense that put up 32 points in a season-opening rout of the New York Jets. But it wasn’t Christian McCaffrey rolling up 147 rushing yards and a touchdown on 28 carries at Levi’s Stadium. The Madden 25 cover athlete was a late scratch with a calf injury. In Aaron Rodgers’ long-awaited return, it was Jordan “JP” Mason who...