Pittsburgh Pirates' Andrew McCutchen hits a home run against the Chicago Cubs during the third inning of a baseball game, Saturday, Sept. 15, 2012, in Chicago. (AP Photo/David Banks)

Chicago Cubs starter Jason Berken pitches against the Pittsburgh Pirates during the first inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

USA Track and Field Paralympian Carlos Leon throws out the ceremonial first pitch before a baseball game between the Chicago Cubs and the Pittsburgh Pirates, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

Pittsburgh Pirates starter Wandy Rodriguez pitches against the Chicago Cubs during the first inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

Pittsburgh Pirates shortstop Clint Barmes right, forces out Chicago Cubs' Welington Castillo at second base and throws to first base on a double play hit by Josh Vitters during the second inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

Pittsburgh Pirates' Andrew McCutchen is greeted by his teammates in the dugout after hitting a home run against the Chicago Cubs during the third inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

Pittsburgh Pirates shortstop Clint Barmes, top, forces out Chicago Cubs' Joe Mather left, at second base during the fifth inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. The Cubs' Darwin Barney was safe at first. (AP Photo/David Banks)

Pittsburgh Pirates manager Clint Hurdle left, argues a call with first base umpire Sam Holbrook during the fifth inning of a baseball game against the Chicago Cubs, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

Pittsburgh Pirates' Clint Barmes right, is greeted by Garrett Jones after hitting a home run against the Chicago Cubs during the seventh inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

El jugador de los Piratas de Pittsburgh, Andrew McCutchen, es felicitado por compañeros tras conectar un jonrón contra los Cachorros de Chicago el sábado, 15 de septiembre de 2012, en Chicago. (AP Photo/David Banks)

Pittsburgh Pirates shortstop Clint Barmes, left, forces out Chicago Cubs' Darwin Barney at second base during the seventh inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

Pittsburgh Pirates catcher Rod Barajas makes an error trying to catch a foul ball against the Chicago Cubs in the eighth inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

Chicago Cubs' Starlin Castro, bottom, dives back into second base with a double as Pittsburgh Pirates shortstop Clint Barmes takes the throw during the eighth inning of a baseball game, Saturday, Sept. 15, 2012 in Chicago. (AP Photo/David Banks)

Pittsburgh Pirates relief pitcher Joel Hanrahan, right, and catcher Rod Barajas (26) celebrate the Pittsburgh Pirates win against the Chicago Cubs in a baseball game, Saturday, Sept. 15, 2012 in Chicago. The Pirates defeated the Cubs 7-6. (AP Photo/David Banks)