Karl Anderson, American wrestler
Chad Allegra (born January 20, 1980), better known by the ring name "Machine Gun" Karl Anderson, is an American professional wrestler currently signed to Impact Wrestling. He is one half of the current Impact World Tag Team Champions with Doc Gallows in their second reign. He also makes appearances for New Japan Pro Wrestling (NJPW).

Anderson is known for his work as a tag team specialist, most notably in New Japan Pro-Wrestling (NJPW), where he is a former four-time IWGP Tag Team Champion. He also holds the record for the longest reign and most defenses with the title, achieved on his first reign with former partner Giant Bernard. Anderson and Bernard also held Pro Wrestling Noah's GHC Tag Team Championship, and were voted tag team of the year by the Wrestling Observer Newsletter in 2011. Anderson is a founding member and the second leader of the Bullet Club stable, and a three-time winner of NJPW's top tag team tournament, the G1/World Tag League, having won it in 2009 with Bernard, in 2012 with Hirooki Goto and in 2013 with Doc Gallows. He also wrestled for Southern California-based independent promotion Pro Wrestling Guerrilla (PWG) between 2007 and 2009.

Anderson spent the majority of his career in Japan, before signing with WWE alongside Gallows, A.J. Styles and Shinsuke Nakamura in 2016. In WWE, Anderson had won the WWE Raw Tag Team Championship twice with his tag partner Gallows. On April 15, 2020, Anderson and Gallows were released by WWE and, three months later, signed a contract with Impact Wrestling, where they won the Impact Tag Team Titles in November.