needs additional citations for verification. Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (January 2009) Glenn Quinn Born Glenn Martin Christopher Francis Quinn 28 May 1970(1970-05-28) Dublin, Ireland Died 3 December 2002(2002-12-03) (aged 32) North Hollywood, California, U.S. Occupation Actor Years active 1990–2002 Glenn Martin Christopher Francis Quinn (28 May 1970 – 3 December 2002) was an Irish actor in television and film, known for playing Mark Healy in the American sitcom Roseanne, and Doyle, a half-demon, on the 1999–2004 television series Angel, a spin-off series of the television series Buffy the Vampire Slayer..