Photo by Carmen Mandato/Getty Images) Pat Riley, Miami Heat Pat Riley is coming under increasing media pressure to retire from the Miami Heat . Gilbert Arenas is the last person to call for Riley to step down from his role on South Beach. “Pat Riley has to fire himself. No one’s complaining about Spo (Erik Spoelstra), but it’s still like he’s overseeing Spo. He’s the Godfather,” Arenas said via his Gil’s Arena podcast. The Heat have endured a difficult season. Jimmy Butler forcing his way out