Espinosa's single in 12th lifts Nats over Astros

AP - Sports
Espinosa's single in 12th lifts Nats over Astros
Washington Nationals closer Tyler Clippard reacts as a Houston Astros' Brett Wallace fly ball to deep center field is caught to end the game with a 3-2 win in 12 innings of a baseball game Tuesday, Aug. 7, 2012, in Houston. (AP Photo/Pat Sullivan)
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