Real world article
(written from a production point of view)
David Allen "D.J." Johnson (born 14 July 1966; age 58) is a former NFL player-turned-actor who played a Klingon cell guard in the Star Trek: Enterprise second season episode "Judgment".
Lockhart-Johnson has also guest starred in Boomtown (with Star Trek: Deep Space Nine guest stars Vanessa Williams and Patrick Kilpatrick) and Bones (with Michael Buchman Silver).