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Fatigue not a factor in Mejia's struggles

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DENVER -- Jenrry Mejia sailed through four scoreless innings Saturday night, allowing three singles and enjoying a 6-0 lead. But he was gone after 4 1/3 innings when he gave up eight runs in the fifth, including Nolan Arenado's grand slam that put the Rockies ahead 8-6 and finished Mejia after 66 pitches.

Mejia threw just 19 pitches to the nine Rockies batters he faced in the fifth, and a batter reached base on each of his final five pitches. Before the game, manager Terry Collins spoke about the need for Mejia to get past the middle of a game and survive a third turn through a lineup. Collins is certain that fatigue is not a factor in Mejia's struggles in that area.

"He's the most conditioned pitcher -- and no disrespect to the other guys -- on that staff," Collins said. "He runs and runs and runs."

Jack Etkin is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.

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