Scheppers had been on the disabled list since April 18 with right elbow inflammation.
To make room on the roster Thursday, the Rangers optioned left-hander Aaron Poreda to Triple-A Round Rock.
In four starts before going on the disabled list, Scheppers was 0-1 with a 9.82 ERA. He was 6-2 with a 1.88 ERA pitching primarily in the eighth inning last season, when his 76 appearances were the most ever for a Texas right-hander.
Alexi Ogando went on the 15-day DL on Wednesday. An MRI showed acute inflammation in his right elbow, and the Rangers say he won't throw again for at least three weeks.