On the October 13, 2008 edition of Raw, Knoxville made his WWE television debut, facing off with The Great Khali.
On January 1, 2022, at WWE's Day 1 pay-per-view, Knoxville announced he would be at the Royal Rumble pay-per-view as a participant in the event's signature namesake match. He entered the Royal Rumble at number nine, but was eliminated by Sami Zayn. He later returned on the February 25 edition of SmackDown and challenged Zayn for the WWE Intercontinental Championship that Zayn had won the week before. The following week on SmackDown, Knoxville would distract Zayn during his match with Ricochet, allowing the latter to win the championship from him. Later that same night, Zayn would challenge Knoxville to match at WrestleMania 38, to which Knoxville accepted. The match was later stipulated as an Anything Goes match, wherein on night two of that event, he won the match against Zayn with the help of some Jackass members.