Glasnow (oblique) will begin a rehab assignment with Triple-A Durham on Friday, Marc Topkin of the Tampa Bay Times reports.
Glasnow is slated for three innings in the first of what's expected to be two or three rehab outings. The big right-hander has been working his way back from a strained oblique which he suffered in late February. Glasnow made two regular-season and one postseason start late last season after making it back from Tommy John surgery.