The agreement with Berkman capped a busy week for the Cardinals, who acquired shortstop Ryan Theriot from the Dodgers and announced a deal with left-handed reliever Brian Tallet on Tuesday.
"It's weird, just being on that side of the infield makes you a little more comfortable. I guess that's because I've played there since I was a little kid," Theriot said. "I can still play short. It's definitely a fun spot for me."