Corey Oswalt offers silver lining as Mets offense offers nothing

WASHINGTON — Corey Oswalt might rank as the Mets’ eighth-best starting pitcher, but his flashes of respectability this season have served a purpose, allowing manager Mickey Callaway to keep Seth Lugo and Robert Gsellman in the bullpen. The rookie Oswalt again showed his value Saturday, but his teammates went belly-flopping into the Potomac in a...