Ross (elbow) will take the mound with High-A Potomac on Thursday, Mark Zuckerman of MASN Sports reports.
EDGE Analysis
This will mark Ross's third rehab start as he continues to work back from Tommy John surgery. He recently tossed a pair of three-inning outings with the club's rookie-level Gulf Coast League affiliate and is expected to require a few more appearances in the minors before returning to Washington.