Chicago Cubs starting pitcher Travis Wood delivers during the first inning of a baseball game against the St. Louis Cardinals, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs third baseman Luis Valbuena fields a ground ball hit for a single by St. Louis Cardinals' Yadier Molina during the fourth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs third baseman Luis Valbuena fields a ground ball by St. Louis Cardinals' Yadier Molina but Molina beat the throw to first during the fourth inning of a baseball game Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs third baseman Luis Valbuena fields a ground ball by St. Louis Cardinals' Yadier Molina but Molina beat the throw to first during the fourth inning of a baseball game Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs third baseman Luis Valbuena fields a ground ball by St. Louis Cardinals' Yadier Molina but Molina beat the throw to first during the fourth inning of a baseball game Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs third baseman Luis Valbuena fields a ground ball by St. Louis Cardinals' Yadier Molina but Molina beat the throw to first during the fourth inning of a baseball game Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs' Alfonso Soriano (12) greets Nate Schierholtz at home after the pair scored on Schierholtz's two-run home run off St. Louis Cardinals starting pitcher Lance Lynn during the fourth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

St. Louis Cardinals starting pitcher Lance Lynn (31) returns to the mound after giving up a two-run home run to Chicago Cubs' Nate Schierholtz, also scoring Alfonso Soriano, during the fourth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs' Nate Schierholtz rounds the bases after hitting a two-run home run off St. Louis Cardinals starting pitcher Lance Lynn, also scoring Alfonso Soriano, during the fourth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

St. Louis Cardinals' Yadier Molina (4) breaks up a double-play attempt by Chicago Cubs shortstop Starlin Castro after Castro forced Molina out at second during the fourth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs third baseman Luis Valbuena fields a ground ball hit for a single by St. Louis Cardinals' Yadier Molina during the fourth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs third baseman Luis Valbuena fields a ground ball hit for a single by St. Louis Cardinals' Yadier Molina during the fourth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

St. Louis Cardinals' Carlos Beltran doubles off Chicago Cubs starting pitcher Travis Wood during the third inning of a baseball game Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

St. Louis Cardinals' Allen Craig makes his way through the dugout after hitting a home run off Chicago Cubs starting pitcher Travis Wood during the second inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

St. Louis Cardinals second baseman Matt Carpenter turns the double play, forcing Chicago Cubs' Alfonso Soriano at second and getting Nate Schierholtz at first, during the second inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

St. Louis Cardinals' Allen Craig watches his home run off Chicago Cubs starting pitcher Travis Wood during the second inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Actor and host of America's Got Talent Nick Cannon, throws out a ceremonial first pitch before a baseball game between the Chicago Cubs and the St. Louis Cardinals Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs relief pitcher Kevin Gregg delivers during the ninth inning of a baseball game against the St. Louis Cardinals, Tuesday, May 7, 2013, in Chicago. The Cubs won 2-1. (AP Photo/Charles Rex Arbogast)

Chicago Cubs catcher Welington Castillo, left, celebrates with relief pitcher Kevin Gregg after their 2-1 win over the St. Louis Cardinals in a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs center fielder David DeJesus, left, and right fielder Nate Schierholtz celebrate their 2-1 win over the St. Louis Cardinals after a baseball game Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs third baseman Luis Valbuena takes a throw from relief pitcher Carlos Marmol and catches St. Louis Cardinals' Yadier Molina trying to steal third during the eighth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs catcher Welington Castillo (53) and relief pitcher Carlos Marmol celebrate the end of the eighth inning of a baseball game against the St. Louis Cardinals, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Cubs right fielder Nate Schierholtz dives at a shallow fly ball off the bat of St. Louis Cardinals' Yadier Molina but is unable to make the catch during the eighth inning of a baseball game, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

St. Louis Cardinals' Matt Holliday reacts after flying out to deep center field to end the the seventh inning of a baseball game against the Chicago Cubs, Tuesday, May 7, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)