But the 39-year-old reliever, who notched his 300th career save on Aug. 15, has resolved to pitch in 2012 rather than retire.
Isringhausen, who did not pitch last season, and then was left behind in spring training when the Mets broke camp this year, said his arm feels too good not to continue his career.
"As of right now, I want to pitch next year," Isringhausen said. "I plan on it the way my arm feels. Getting the rest of my body in shape over the winter the way I know I can, losing a few pounds, I think everything will be fine. And the way my arm feels, then I have nothing to hold me back."
Isringhausen said he will receive a shot soon to relieve the irritation from the pinched nerve.
He said the herniated disk issue has surfaced throughout the season and been managed. Isringhausen finally got it thoroughly examined Thursday, with rosters expanded and him comfortable that his workload could be absorbed by minor league call-ups.
Also injury-wise, first baseman Ike Davis was examined at the Hospital for Special Surgery in Manhattan on Thursday. Doctors concurred that his troublesome left ankle, which was originally injured on May 10, will not require surgery, Davis said.
Meanwhile, longtime Mets PR man Jay Horwitz suffered multiple fractures to his right ankle walking from a nearby hotel to Citi Field on Thursday. He will remain hospitalized until undergoing surgery Monday. Horwitz last missed a Mets game in 1990.
Adam Rubin covers the Mets for ESPNNewYork.com.