Chicago Cubs pitcher Jake Arrieta throws to the San Francisco Giants during the first inning of a baseball game, Tuesday, May 27, 2014, in San Francisco. (AP Photo/George Nikitin)
San Francisco Giants' Buster Posey hits an RBI fly ball against the Chicago Cubs' during the first inning of a baseball game, Tuesday, May 27, 2014, in San Francisco. Cubs catcher Welington Castillo is catching. (AP Photo/George Nikitin)
San Francisco Giants pitcher Tim Hudson throws to the Chicago Cubs during the first inning of a baseball game, Tuesday, May 27, 2014, in San Francisco. (AP Photo/George Nikitin)
San Francisco Giants pitcher Tim Hudson throws to the Chicago Cubs during the first inning of a baseball game, Tuesday, May 27, 2014, in San Francisco. (AP Photo/George Nikitin)
Chicago Cubs' Nate Schierholtz (19) singles against the San Francisco Giants during the sixth inning of a baseball game on Monday, May 26, 2014, in San Francisco. (AP Photo/Marcio Jose Sanchez)
Chicago Cubs' Emilio Bonifacio drives in a run with a triple against the San Francisco Giants during the fifth inning of a baseball game on Monday, May 26, 2014, in San Francisco. (AP Photo/Marcio Jose Sanchez)
San Francisco Giants' Pablo Sandoval celebrates his two-run home run against the Chicago Cubs during the fourth inning of a baseball game on Monday, May 26, 2014, in San Francisco. (AP Photo/Marcio Jose Sanchez)