Billingsley threw a 31-pitch bullpen session Tuesday in Arizona but reported weakness in his surgically repaired right elbow afterward. He will meet with team doctor Neal ElAttrache in Los Angeles on Thursday.
Billingsley made a rehab start for Class A Rancho Cucamonga on Sunday, allowing a run on two hits in 1 2/3 innings. According to reports, he topped out at 93 mph and was able to throw his fastball, changeup and curveball.
He would have made his next rehab start Friday, but that outing now will be put on hold. In late April, Billingsley's rehab was cut short when he felt a pop in his elbow during a minor league start. He was diagnosed with tendinitis and told he had torn some scar tissue.
The Dodgers were hopeful this spring that Billingsley could rejoin their rotation by June, but that seems like a long shot now. At the moment, they have no need for starting pitching, as Josh Beckett and Dan Haren both have pitched well in the back of their rotation.
"I'm sure it's frustrating for him," Dodgers manager Don Mattingly said. "For us, it's tough because when a guy's rehabbing, it's like you don't really have him until you have him."