Gregerson (oblique) will throw an "aggressive" bullpen session Wednesday, manager A.J. Hinch said, Brian McTaggart of MLB.com reports.

EDGE Analysis

The right-hander was cleared to resume mound work less than a week after landing on the DL, and if he's able to successfully dial up the intensity Wednesday, Gregerson should get the green light to bypass a minor league rehab assignment. Ken Giles recently took over in the closer role for Will Harris, who took the job from Gregerson back in early June.