May 20 6:46p
McDonald (back) is also dealing with a right elbow injury, the Pittsburgh Post-Gazette reports.

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Impact
McDonald is currently on the 15-day DL with a strained lower back but has also been bothered by an elbow issue, according to manager Clint Hurdle, who said McDonald will eventually go on a minor league rehab assignment. The earliest McDonald can come off the DL is May 30.

(RotoWire)