PORT ST. LUCIE — Jason Isringhausen will give his comeback shot with the Mets at least another two weeks.

After a day of deliberation, the veteran righty Wednesday accepted the team’s invitation to participate in extended spring training. The 38-year-old reliever, who was squeezed from the Opening Day roster by Blaine Boyer, has been told his situation will be re-evaluated within two weeks.

“I’ve come this far, two more weeks won’t kill me,” said Isringhausen, who last pitched in the major leagues in 2009.

The Mets have told Isringhausen they will release him from his minor-league contract if another team wants him before extended spring training concludes. But the Mets also have right of first refusal, meaning they could block Isringhausen from joining an NL East rival such as the Phillies, who are searching for bullpen help with closer Brad Lidge expected to miss the first 4-6 weeks of the season.

Isringhausen, who posted a 1.29 ERA in seven spring training appearances, said he wasn’t upset with the Mets’ decision to leave him off the Opening Day roster.