Mets fall in extras after Oswalt goes 6 strong

Oswalt K's Realmuto MIAMI -- The Mets may have lost Saturday night, 4-3 in 11 innings to the Marlins, but Corey Oswalt continues to impress with another promising performance.

Jacob Rhame was tagged with the loss on Saturday -- the right-hander surrendered a walk-off base hit to Marlins backup catcher and pinch-hitter Bryan Holaday.

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Since being recalled from Triple-A Las Vegas on Aug. 3, to replace an injured Steven Matz, Oswalt has shown he is continuing to develop, putting together his second consecutive solid outing on Saturday.

The rookie has proven he has the ability to not only ease the workload of the other Mets starters -- as manager Mickey Callaway has hinted at…