Chicago Cubs second baseman Emilio Bonifacio relays to first after forcing out St. Louis Cardinals' Allen Craig (21) at second during the sixth inning of a baseball game Friday, May 2, 2014, in Chicago. The Cardinals Jon Jay was out at first for the double play. Watching the action is shortstop Starlin Castro. (AP Photo/Charles Rex Arbogast)
St. Louis Cardinals fielder Randal Grichuk is unable to catch a deep fly ball from Chicago Cubs' Welington Castillo during the second inning of a baseball game Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
St. Louis Cardinals catcher Yadier Molina, left, listens to starting pitcher Adam Wainwright during the second inning of a baseball game against the Chicago Cubs Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
St. Louis Cardinals' Jhonny Peralta runs up the baseline as he hits an RBI double off Chicago Cubs starting pitcher Travis Wood, scoring Matt Carpenter, during the third inning of a baseball game Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
Chicago Cubs starting pitcher Travis Wood delivers during the first inning of a baseball game against the St. Louis Cardinals Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
during the St. Louis Cardinals manager Mike Matheny, left, talks with starting pitcher Adam Wainwright and the complete infield during the fifth inning of a baseball game on Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
St. Louis Cardinals catcher Yadier Molina, left, pats starting pitcher Adam Wainwright during the fifth inning of a baseball game against the Chicago Cubs, Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
Chicago Cubs' Anthony Rizzo (44) celebrates his home run off St. Louis Cardinals starting pitcher Adam Wainwright with Starlin Castro during the fifth inning of a baseball game on Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
Chicago Cubs' Anthony Rizzo watches his home run off St. Louis Cardinals starting pitcher Adam Wainwright during the fifth inning of a baseball game on Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
Chicago Cubs' Anthony Rizzo watches his home run off St. Louis Cardinals starting pitcher Adam Wainwright during the fifth inning of a baseball game on Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)
Chicago Cubs' Anthony Rizzo hits a home run off St. Louis Cardinals starting pitcher Adam Wainwright during the fifth inning of a baseball game on Friday, May 2, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)