From 1985 to 1989, Koenig played a recurring role as Richard "Boner" Stabone, best friend to Kirk Cameron's character Mike Seaver in the first four seasons of the ABC sitcom "Growing Pains". During the same period, he guest starred on episodes of the sitcoms "My Sister Sam" and "My Two Dads" as well as the drama "21 Jump Street". In the early 1990s he provided a voice for the animated series ' as and Night Creeper Leader, and had a minor role as Tumak in the 1993 ' episode "".