Hamels was placed on the 10-day DL Wednesday with a right oblique strain and is expected to miss about eight weeks, the Dallas Morning News' Evan Grant reports.
He suffered the injury while warming up for his start on Tuesday before eventually being scratched. This is a huge blow to the Rangers and Hamels' fantasy owners, as it was thought he might only need a couple weeks off before returning to the rotation, but might now be out until the All-Star break. Nick Martinez is expected to remain in the rotation for the time being, as Tyson Ross (shoulder) has yet to go on a rehab assignment.