Scheppers had been on the disabled list since April 18 with right elbow inflammation.
In four starts before going on the disabled list, Scheppers was 0-1 with a 9.82 earned-run average. 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 exam showed acute inflammation in his right elbow, and the Rangers say he won't throw again for at least three weeks.
The Colorado Rockies put right-hander Jordan Lyles on the 15-day disabled list with a fractured left hand.
Lyles broke a bone just below the knuckle of his middle finger when he tried to tag out Arizona's