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04/03/12 7:10 PM ET

Utley to continue rehabbing knees in Arizona

Second baseman will rejoin Phillies on 10-game road trip

PHILADELPHIA -- Chase Utley will leave the Phillies to intensify the rehab of his knees with Arizona therapist Brett Fischer and plans to rejoin the team in two weeks while it is on a 10-game road trip.

"You know Chase, he doesn't want to be a distraction and this is the best way for him not to be one," Phillies general manager Ruben Amaro Jr. said Tuesday. "He is progressing well, we just want to build on it."

Fischer, visited by Utley two weeks ago, has worked with several high-profile athletes, including former Eagles quarterback Donovan McNabb.

The Phils, whom Amaro said will have five players -- Utley, Ryan Howard, Michael Martinez, Jose Contreras and Justin DeFratus -- on the disabled list when the regular season begins Thursday afternoon in Pittsburgh, refuse to issue any estimation on how long the right side of their infield will be missing.

"I do know they are doing better," said Amaro. "Howard has a follow up with [Dr. Mark Myerson] on the 10th and then we will know a little more about his availability to do more baseball stuff.

"He has been throwing and doing some strength stuff and progressing pretty well. The wound [torn Achilles] is starting to heal more aggressively. Once in heals up we'll go stronger with some of the baseball stuff."

The Phillies expect to get their roster down to 25 after Tuesday night's exhibition game against the Pirates.

"Michael Stutes [sore right shoulder] is pitching in a [Florida] game today," said Amaro. "Depending on how he comes out of that, we will make a decision on his status.

"A lot will depend on Stutes and some other small decisions we have to make after the game."

Jay Greenberg is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.