SAN FRANCISCO -- In another delay in his recovery from forearm surgery, left-hander Noah Lowry has been advised not to throw for at least another three weeks.

Lowry also will visit noted orthopedist Dr. James Andrews on Monday in Birmingham, Ala., for another opinion on his injury.

"I think we're on the right path, but it's been a long enough time and it's not getting better. We need to double check," Giants head athletic trainer Dave Groeschner said.

Lowry, the Giants' leading winner in two of the last three seasons, underwent surgery March 7. He had planned to begin throwing off a mound on April 21 but scrapped those plans when he felt tingling in his arm.

Because of that symptom and similar sensations, Lowry visited Dr. Gordon Brody, who performed his surgery, on Tuesday for another test to determine whether the nerves in his arm are firing correctly. Rest was prescribed.

When a reporter mentioned that manager Bruce Bochy said that Lowry will stop throwing for three weeks, Groeschner said, "It could be a little bit longer. ... He's still having symptoms. The doctors think they'll go away with time. But it is going to be time."

The Giants will carefully watch catcher Bengie Molina, who rested Wednesday. Molina has been bothered by discomfort in his upper right leg and plainly wasn't running well in Tuesday night's game. San Francisco can ill-afford to lose Molina, who's batting .299 with a team-high four homers and 17 RBIs, for any length of time. Also, due to Triple-A catcher Eliezer Alfonzo's 50-game suspension for using performance-enhancing substances, the Giants would be hard-pressed to find catching help if Molina were to go on the disabled list.

On a more optimistic note, Groeschner said that he expects shortstop Omar Vizquel to begin participating in extended Spring Training games by the weekend.