Pro Wrestling Guerrilla (PWG) is an American professional wrestling promotion based in Los Angeles, California. It is owned and operated by wrestlers themselves, having been created by Disco Machine, Excalibur, Scott Lost, Joey Ryan, Super Dragon, and Top Gun Talwar. Since then, Disco, Talwar, Ryan and Lost have retired and left the company. Since 2007, Excalibur has been the head play-by-play commentator, with a rotation of wrestlers on color commentary.

Marc Letzmann, better known by his ring name Excalibur, is an American professional wrestling commentator and former professional wrestler. He is currently signed to All Elite Wrestling (AEW) where he serves as play-by-play commentator on Dynamite and Rampage. He is also one of the six founders of Pro Wrestling Guerrilla, where he continues to work as the company's "Liaison to the Board of Directors". After retiring from in-ring competition in 2007, he became the company's lead play-by-play commentator.