Marc Letzmann, better known by his ring name Excalibur, is an American professional wrestling commentator and retired wrestler signed to All Elite Wrestling (AEW) as the play-by-play voice of Dynamite. He is also a co-founder of Pro Wrestling Guerrilla (PWG) and serves as its liaison to the board, having transitioned to commentary after retiring from in-ring competition in 2007.

Filmography