Casey played Damar in Deep Space 9. Besides this long-term character, he guest-stared on several shows, including Chronicle, Invisible Man, Gideon's Crossing, and ER. In ER, he played the possible love interest of Dr. Weaver. It was shortly after this that the character came out as a lesbian. Coincidence? :-) (hey, Casey joked about it too!)
Casey was also married to Voyager regular Roxanne Dawson for several years!