Cardinals sent LHP John Gaub outright to Triple-A Memphis. The move clears a spot on the 40-man roster for Chris Carpenter. Gaub has spent all year at the Triple-A level, posting a 5.40 ERA while striking out 57 over 53 1/3 innings.

Cardinals claimed LHP John Gaub off waivers from the Rangers. Gaub was designated for assignment earlier this week to clear a spot on the 40-man roster for Tanner Sheppers. He's been claimed three different times this season and will continue to serve as organizational depth.

Rangers designated LHP John Gaub for assignment. Gaub spent only a couple of weeks in the Rangers' system after being claimed off waivers from the Rays. He might be open to accepting a spot at the Triple-A level.