Davis has spent the bulk of the campaign at Indianapolis, where he supplied a 5.64 ERA and 1.59 WHIP in 52.2 innings. Those numbers didn't make a strong case for Davis to receive a September callup, so the Pirates elected to drop him from the 40-man roster to clear room for a more deserving option.

Davis originally landed on the shelf in early June due to a blister but ended up facing an extended absence after the forearm injury cropped up during his rehab assignment. The 26-year-old has a 6.75 ERA, 1.88 WHIP and 10:8 K:BB over 10.2 innings and should see the majors again this season, if only when rosters expand in September.

Davis has been sidelined since early June. While he remains without a timetable for his return, this move means he won't be eligible to return until at least Aug. 7. Parker Markel was claimed off waivers in a corresponding move.

Davis has been on the injured list since early June, originally due to a blister. He was shut down for 10 days late in the month due to forearm tightness but appears to be working his way back now. His return timeline remains unclear.