The Reds placed Abbott on the 15-day injured list Friday with a left shoulder strain.
Abbott was initially the Reds' probable pitcher for Friday's game against the Pirates, but Cincinnati named reliever Buck Farmer as the opener before eventually putting Abbott on the shelf. If the left-hander can return when first eligible Sept. 4, he'd only miss one more start. Cincinnati recalled Alan Busenitz from Triple-A Louisville in a corresponding move, and he could fill Abbot's spot in the rotation after getting stretched out to four innings and 45 pitches in his last appearance for Louisville on Aug. 17. Abbott has a 3.72 ERA across 138 innings spanning 25 starts this season.