Jay, 25, entered Monday's game batting .362 with a .412 on-base percentage and a .596 slugging percentage for Memphis. He's a left-handed hitter, and the Cardinals don't currently have any of those on their bench -- save for switch-hitter Felipe Lopez. Meanwhile, playing time has been scarce for right-handed hitters Allen Craig, Joe Mather and Nick Stavinoha -- especially Stavinoha, who entered Monday's game with seven plate appearances.
"I think it's flexible or fluid," general manager John Mozeliak said when asked about his team's bench. "One thing that we think about when looking at it is playing time. At some point, if we feel we're just not getting enough at-bats for somebody here, it may make sense to switch."