Boston's team physician disagrees. He believes the tendon is damaged, not torn, and rehabilitation gives Schilling the best chance to play this year.
"The problem has probably been building up for two years, and he just went over the red line," Schilling's physician, Dr. Craig Morgan, said Friday. "Instead of being a single tendon, it's like three pieces of spaghetti or linguine, and when that happens it's end-stage disease in the tendon."
A third doctor, Mets medical director David Altchek, agreed that the tendon was torn but said surgery would probably sideline him for the season, Morgan said. Schilling, concerned that the Red Sox would invalidate his $8 million, one-year contract if he chose surgery, then agreed to rehab.
"On our conference call on Wednesday it was their strong recommendation that he go with the conservative approach," Morgan said in a telephone interview with The Associated Press on Friday.
"And, furthermore, it was their strong - how do I say this? - they would not approve him having surgery. Basically, according to the collective bargaining agreement, if they don't approve it, they don't have to pay him. His contract's null and void."
The team declined comment Friday.
Schilling spent seven weeks on the disabled list last year with tendinitis in the shoulder. But he passed the physical exam for the contract he agreed to on Nov. 6. Then, the shoulder deteriorated.
He couldn't shake hands or open a door without intense pain, Morgan said.
"I think his chance of coming back to pitching with rehab or a conservative approach is zero," Morgan said. "He might not come back after surgery, either. However, if the surgery is successful, he should be fully rehabbed by about All-Star break."
In his blog, 38pitches.com, Schilling praised Morgan in a posting Thursday night but said he never considered acting against the club's wishes.
Morgan said among those on the conference call were Red Sox general manager Theo Epstein, manager Terry Francona, team physician Dr. Thomas Gill, Schilling, the pitcher's lawyer and Altchek.
Under a side letter baseball's collective bargaining agreement, when there is disagreement between a team doctor and a second opinion obtained by a player, the sides are urged to settle on an acceptable third physician to resolve the disagreement.
Schilling "felt trapped" and agreed to rehabilitation since his contract could be voided if he had surgery, Morgan said. "He didn't have any alternative other than throw $8 million away."
Altchek did not return a call seeking comment.
The 41-year-old right-hander has struggled with his health and weight. He was sidelined for parts of two of the last three seasons and has said that 2008 will be his last season.