Jason Derik Isringhausen is an American former professional baseball pitcher and coach. He pitched in Major League Baseball from 1995 through 2012 for the New York Mets, Oakland Athletics, St. Louis Cardinals, Tampa Bay Rays, and Los Angeles Angels of Anaheim. Isringhausen was, with Bill Pulsipher and Paul Wilson, a member of "Generation K", a group of highly regarded Mets prospects. Isringhausen proceeded to have a successful career as a relief pitcher, recording exactly 300 career saves. He was a two-time All-Star and led the National League in saves in 2004.

The New York Mets are an American professional baseball team based in the New York City borough of Queens. The Mets compete in Major League Baseball (MLB) as a member of the National League (NL) East Division. They are one of two major league clubs based in New York City, the other being the American League's (AL) New York Yankees. One of baseball's first expansion teams, the Mets were founded in 1962 to replace New York's departed NL teams, the Brooklyn Dodgers and the New York Giants. The team's colors evoke the blue of the Dodgers and the orange of the Giants.