 In June of that year, he was called up to Texas, and remained with the big league club almost exclusively until his tenure with the Rangers ended.was a career year for Mahay, as he notched a career-highs in appearances (60), ERA (2.55) and strikeouts (54).He was one of the mainstays of the Rangers' bullpen from 2003-, especially in the and seasons, as Mahay (along with C. J. Wilson) was one of only two regular left-handed relievers on the Rangers' roster.