Jason Isringhausen, American baseball player and coach
Jason Derik Isringhausen ( born September 7, 1972) 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.