A.J. Tannen
A.J. Tannen was Lt., Alfred Aldridge, in JAG, and continued to act on both the small screen and the big screen since then! Appearing in shows such as Transparent, New Girl, Silicon Valley, and films such as The Darkness, where he played Frank Thomas Jr., and in Variant, as Ben.
Corbin Bernsen
Another actor who has certainly not hung his hat up in the entertainment industry since he played Captain Owen in JAG is Corbin Bernsen. He has acted in General Hospital as John Durant, played Harlan Dexter in Kiss Kiss Bang Bang, Father Todd Williams in The Young and the Restless, not forgetting Henry Spencer on Psych. Bernsen founded Team Cherokee Productions, his own production company, and later Home Theatre Films, with his producing partner, Chris Aronoff, where he currently works as a writer, producer, and actor.