Dahlstrand (elbow) made a rehab start for short-season Lowell on Wednesday, allowing one run on six hits and one walk while striking out one.
The 24-year-old Dahlstrand has made a slow slog through the organization, but had some scouting buzz after 2014 and appeared poised for a breakthrough season. After an impressive start to 2015, he underwent Tommy John elbow surgery and has been working his way back since.