Matt Mulhern (born July 21, 1960 in Philadelphia, Pennsylvania) is an American actor who has starred in such films as One Crazy Summer and Biloxi Blues, and such television series such as Major Dad, JAG, and Rescue Me (playing Lt. John Stackhouse).Mulhern attended Pascack Hills High School in Montvale, New Jersey.Matt Mulhern was trained as an actor by William Esper at Mason Gross School of the Arts, where he received a BFA in Acting.