Greene (groin/back) will head to Goodyear (Ariz.) for rehab and treatment, MLB.com reports.
A recent MRI confirmed Greene has a Grade 1 groin strain, and the right-hander was given an epidural for the back. Grade 1 is the mildest of the groin strains, which might indicate a minimum stay on the 15-day injured list, but the back issue has an undetermined recovery time. His return could push out to early July.