Washington Nationals' Doug Fister works against the Oakland Athletics in the first inning of a baseball game on Friday, May 9, 2014, in Oakland, Calif. (AP Photo/Ben Margot)
Oakland Athletics' Tommy Milone works against the Washington Nationals in the first inning of a baseball game on Friday, May 9, 2014, in Oakland, Calif. (AP Photo/Ben Margot)
Washington Nationals' Doug Fister works against the Oakland Athletics in the first inning of a baseball game on Friday, May 9, 2014, in Oakland, Calif. (AP Photo/Ben Margot)
Washington Nationals' Doug Fister, left, walks back to the mound after giving up a home run to Oakland Athletics' John Jaso, right, in the third inning of a baseball game on Friday, May 9, 2014, in Oakland, Calif. (AP Photo/Ben Margot)
Oakland Athletics' Yoenis Cespedes (52) is congratulated by Josh Reddick, right, after Cespedes hit a home run off Washington Nationals' Doug Fister in the fifth inning of a baseball game on Friday, May 9, 2014, in Oakland, Calif. (AP Photo/Ben Margot)
Oakland Athletics' Tommy Milone works against the Washington Nationals in the first inning of a baseball game on Friday, May 9, 2014, in Oakland, Calif. (AP Photo/Ben Margot)
Los Angeles Dodgers right fielder Yasiel Puig, right, watches from the dugout during a baseball game against the Washington Nationals at Nationals Park, Tuesday, May 6, 2014, in Washington. The Dodgers won 8-3. (AP Photo/Alex Brandon)
Washington Nationals starting pitcher Stephen Strasburg (37) throw against the Los Angeles Dodgers during the first inning of a baseball game, Wednesday, May 7, 2014 in Washington. Nationals won 3-2. (AP Photo/Pablo Martinez Monsivais)
Washington Nationals catcher Wilson Ramos returns to the locker room following the baseball game against the Los Angeles Dodgers, Wednesday, May 7, 2014 in Washington. Ramos returned today from rehab and hit the go-ahead sacrifice fly as the Nationals won 3-2.(AP Photo/Pablo Martinez Monsivais)