Dwight Schultz is an american actor and voice actor. He is best known for his roles as Captain "Howling Mad" Murdock in the A-Team,Lieutenant Barclay in Star Trek: The Next Generation, for voicing Mung Daal in Chowder, Pyg in Batman Arkham Knight and for Voicing Master Neloth] in Skyrim's Dragonborn DLC.
He voices Wyrm in TMNT.
if you are interested in his full list of roles, you can find them here