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WASHINGTON, DC - APRIL 15: Tanner Roark #57 of the Washington Nationals pitches against the Philadelphia Phillies at Nationals Park on April 15, 2017 in Washington, DC. All players are wearing #42 in honor of Jackie Robinson Day. (Photo by G Fiume/Getty Images)

WASHINGTON, DC - APRIL 15:  Tanner Roark #57 of the Washington Nationals pitches against the Philadelphia Phillies at Nationals Park on April 15, 2017 in Washington, DC.  All players are wearing #42 in honor of Jackie Robinson Day.  (Photo by G Fiume/Getty Images)