Chad Allegra is an American wrestler signed to WWE, where he performs on the SmackDown roster under the ring name Karl Anderson.

In WWE Anderson won the Raw Tag Team Championship twice. However, he is best known for his stints in New Japan Pro-Wrestling where he won the IWGP Tag Team Championship four times and the NEVER Openweight Championship once.

In early 2007, Anderson made his debut for Pro Wrestling Guerrilla, soundly defeating wrestlers such as Frankie Kazarian and Colt Cabana. He continues to make PWG shows throughout the year, teaming up with Joey Ryan.

Anderson and Gallows made a surprise return to WWE on the October 10, 2022 episode of Raw by helping AJ Styles against Judgment Day and reforming the O.C.. Gallows and Anderson wrestled their first WWE match on the October 17, Raw, defeating Alpha Academy. On Nov. 5, at Crown Jewel, the O.C. he was defeated by Judgment Day.

On the January 9 episode of Raw, Anderson and Gallows participated in a Tag Team Turmoil match to determine the #1 contenders for The Usos' Raw Tag Team Championship but were eliminated first by Judgment Day.

On April 28, 2023, as a result of the Draft, the O.C. moved up to the SmackDown roster.