On July 19, 2004, the Mets acquired right-handed pitcher Mike DeJean from the Baltimore Orioles in exchange for outfielder Karim Garcia. DeJean made his Met debut the following day throwing an inning of scoreless relief in the Mets 9-7 loss to the Florida Marlins. DeJean would appear in 17 games for the Mets, all out of the bullpen, posting a 1.69 ERA in 21 1/3 innings.
Mike DeJean returned to the Mets in 2005 making the Opening Day roster. In 28 relief appearances, he posted a 3-1 record with a 6.11 ERA before being released on July 20th. His first win as a Met occurred on April 13 against the Houston Astros when he pitched a scoreless top of the 11th in the Mets 1-0 victory.
In 45 relief appearances for the Mets over two seasons, DeJean posted a 3-1 record with a 4.21 ERA.
With the Mets DeJean wore number 35.
Mike DeJean also played for the following teams:
Colorado Rockies – 1997-2000, 2005,2006
Milwaukee Brewers – 2001-2003
St. Louis Cardinals – 2003
Baltimore Orioles – 2004