The Rangers claimed left-handed pitcher John Gaub off of waivers from the Rays, Roger Mooney of the Tampa Tribune tweets. The Rays had designated Gaub for assignment three days ago to create roster space for Drew Sutton.
Gaub, 27, appeared in four games for the Cubs last season and has a 3.81 ERA with 11.8 K/9 and 6.3 BB/9 across parts of four Triple-A seasons. The Rays claimed him off of waivers from the Cubs in April then stashed him at Triple-A. Robbie Ross is the Rangers' lone left-handed reliever at the moment, so Gaub provides some depth.