Santana (thigh) could rejoin the Diamondbacks on Friday, Steve Gilbert of MLB.com reports.
Santana is currently on a rehab assignment at Triple-A Reno and played a third consecutive day at first base Thursday. Finding room on the roster should not be an issue, as Arizona has a few players with minor-league options, though finding playing time will be more difficult. Ildemaro Vargas, who had a 24-game hit streak to open the season, has filled in at first base, and manager Torey Lovullo said there are no plans to take playing time away from him. DH is an obvious option, but Jose Fernandez and Adrian Del Castillo are also producing at the plate.