Should the Padres be looking for a new closer?

The closer position is something that the San Diego Padres haven't had to worry about all season. Free-agent acquisition Mark Melancon has a league-leading 27 saves and was voted to the All-Star game. He's got a 2.04 ERA, and according to WAR, he's been the eighth-most valuable Padre this season. Those numbers are a mirage, though, and if the Padres don't address the closer role, it might cost them.