While in Houston, Rodriguez took batting practice twice and still felt pain in the oblique. In one session, Rodriguez had to quit because he was in such pain.
Rodriguez will now go to Miami this weekend and work with a physical therapist, who is employed by the NBA's Miami Heat. Rodriguez plans to stay in Miami for at least a week.
"[The injury] is not letting up. He is going to back off and get some physical therapy," manager Davey Johnson. "Hopefully, the therapist can relieve some of the tightness in there."
In the meantime, catcher Jesus Flores will continue to be the backup catcher. Johnson acknowledged that Flores' arm is weaker than what it was before he missed more than two years after a foul tip off the bat of D-backs outfielder Chris Young hit Flores in the right shoulder.
Before Friday's game against the Dodgers, Flores was working on his throwing with bench coach Pat Corrales. Flores will work on strengthening his arm when he is not playing. Flores is expected to play Sunday afternoon against Los Angeles. Johnson said Flores will play once every third game.