"He figured they were giving them that side of the diamond, he put it down," Renteria said of Rizzo's at-bat in the first. "The next at-bat, he looked out there and they were doing the same [defensive shift], and he said, 'You know what, I'll do it again.'"
Which Rizzo did in the fourth inning. He scored that inning on Starlin Castro's home run.
In Rizzo's next at-bat in the fifth, the Cardinals did not shift as dramatically as before.
"He's smart enough that he's starting to understand the game more and more and taking advantage of it," Renteria said.
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.