|Full name||David Mahoney|
|Date of birth||April 14, 1981|
|Place of birth||Newton, Massachusetts, United States|
|Height||6 ft 2 in (1.88 m)|
|2003–04||Cornell Big Red|
|2004||Cape Cod Crusaders||16||(0)|
|2005||Western Mass Pioneers||1||(0)|
|2006||→ Seattle Sounders (loan)||5||(0)|
|* Senior club appearances and goals counted for the domestic league only.
Mahoney played college soccer at Brown University during the 2001 and 2002 seasons before transferring to Cornell University for 2003 and 2004. During his college years he was prolific in the Premier Development League, playing for Bradenton Academics and Cape Cod Crusaders. In 2005, he played one game for the Western Mass Pioneers.
He began his professional career with the Chicago Fire in 2005 as part of the newly formed MLS Reserve Division. He got his first call up after the two other goalkeepers on the Chicago Fire, Zach Thornton and Matt Pickens became injured. He started 3 games in October with a record of 1-1-1 with a 1.33 GAA, 7 saves and 1 shutout (10/01 @ Kansas City). In 2006, the Fire sent Mahoney on loan with the Seattle Sounders in the USL First Division.
In June 2014 Mahoney married longtime girlfriend Rachel Buchanan in Chicago.