The Diamondbacks placed Soroka on the 15-day injured list Sunday due to right arm inflammation.
The right-hander struggled in his most recent start Saturday versus the Reds, surrendering six runs on six hits and three walks across 3.1 innings. Soroka missed nearly two months earlier this summer due to a glute injury, and an arm injury offers the possibility of a longer absence. He'll be eligible for reinstatement in early September but doesn't yet have an official timeline for his return.