Arizona manager Torey Lovullo said after Tuesday's 14-1 win over the Cardinals that he expects Kelly (shoulder) to miss at least one month after landing on the 15-day injured list, Theo Mackie of The Arizona Republic reports. "We're not looking in terms of weeks as what we had hoped for," Lovullo said of Kelly's timetable for a return from a teres major strain in his right shoulder. "So I think the next step up is a month, more than that."

The Diamondbacks placed Kelly on the 15-day injured list Tuesday, retroactive to April 20, with a right shoulder strain.

Kelly disclosed Sunday that he was diagnosed with a teres major strain of his right shoulder following his initial MRI and is on track to receive another MRI on Monday in Phoenix, ESPN.com reports.

Kelly is returning to Phoenix to be evaluated Sunday after receiving an MRI on his right shoulder, Nick Piecoro of The Arizona Republic reports.

Kelly was scratched from Sunday's game against the Giants, Nick Piecoro of The Arizona Republic reports.

Kelly yielded a run on three hits and two walks over five innings in a no-decision Monday. He struck out five during the loss to the Cubs.

Kelly (2-0) got the win over the Rockies on Tuesday, allowing two runs on six hits and three walks in six innings. He struck out four.

Kelly allowed four hits and one walk while striking out seven over 3.1 innings in Monday's spring start against Oakland.

Kelly allowed two runs on five hits and struck out four over three innings in Wednesday's spring start against the Rockies.

Kelly struck out three over two hitless and scoreless innings in Friday's start against the Cubs.