NEW YORK (AP) -- Johan Santana needs surgery for bone chips in his left elbow and the star pitcher is out for the season, the latest blow to a New York Mets team battered by injuries.
The team said their 30-year-old ace is expected to be ready for spring training next year. The two-time Cy Young winner was examined Tuesday by Mets medical director Dr. David Altchek in New York.
Mets general manager Omar Minaya said Santana was evaluated around the All-Star break, adding the injury worsened in recent weeks, especially after his last start. The GM said "nothing major was there" during the previous checkup.
"It's mostly soreness. It's my understanding from the doctors there are bone chips," Minaya said on a conference call.
"We all want to see Johan Santana pitching in September. But this is a smart move because we want to see him pitching for the long haul," he said.
The Mets had feared a major setback to Santana, who has four seasons left on his $137.5 million, six-year contract. Instead, he will have arthroscopic surgery.
Manager Jerry Manuel said Santana wanted to keep throwing, despite complaining of elbow soreness after his last outing, but the team decided to shut him down.
"He felt he could still pitch. He wanted to come on the plane and give it a shot," Manuel said before Tuesday night's game at Florida. "When it gets to the point where he says something, then the red flags went up."
Santana was put on the 15-day disabled list and became the 12th Mets player on the DL, joining David Wright, Carlos Beltran, Jose Reyes, Carlos Delgado, J.J. Putz, John Maine and others.
The development with Santana came on the same day that the fourth-place Mets traded reliever Billy Wagner to Boston for two players to be named. Lefty pitcher Pat Misch and first baseman-outfielder Nick Evans were recalled from Triple-A Buffalo.
What began for the Mets as a season with hopes of reaching the World Series has fallen apart, leaving them out of contention and wondering when the next injury will occur.
On Monday, the Mets said Santana would be scratched from his next scheduled start because of his elbow was bothering him. Strong at the start of the season, his stats had dipped noticeably since June -- he was 7-2 with a 1.77 ERA and averaged nearly 12 strikeouts per nine innings before then, but was 6-7 with a 4.02 ERA and averaged 5 1/2 strikeouts after.
Santana is 13-9 with a 3.13 ERA in 25 starts in his second season with the Mets. He was acquired in a February 2008 trade with Minnesota.
"It was never pain. It was discomfort," Mets pitching coach Dan Warthen said. "If he had ever said pain, then he would have never, ever thrown. We all go through discomfort."
Warthen said the Mets didn't pull Santana after the All-Star break evaluation "because at times it didn't hurt him. It really didn't bother him."
"He was able to pitch a couple different times. Then the last few, you could see the velocity going down, then you really start to concern yourself. Johan never, ever says anything about his own physical pain. Then he actually finally came clean and said this thing really is bugging me."
Santana had arthroscopic surgery on torn cartilage in his left knee last October, after the season ended. He went 16-7 and led the majors with a 2.53 ERA in his first year with the Mets.
Mets outfielder Jeff Francoeur returned to the lineup Tuesday night after tearing a ligament in his left thumb over the weekend.
Putz was scratched from a rehab appearance in Class A because of tightness in his forearm. Manuel said he was not optimistic the reliever would pitch again this season.
Mets pitcher Oliver Perez, meanwhile, was having his right knee evaluated in New York. Manuel said he didn't think the lefty would make his next scheduled start Friday.
"I'm very doubtful," Manuel said. "I'm tired of being optimistic."