He teamed with Nick Berk, losing to MNM (Joey Mercury and Johnny Nitro).

On December 12, 2009 Matthews lost to Tito Santana at NWS/WSU The Awesome Challenge in Flemington, New Jersey.

On the January 18, 2018, Impact Wrestling tapings, KM attacked James Storm with a beer bottle, smashing it over his head, after he joined the American Top Team.

[9] Matthews would later argue with Impact Wrestling Executive Vice President Scott D'Amore on Twitter over the amount they pay their talent.

[10] KM debuted on Monday, October 4, 2021 on an episode of AEW Dark: Elevation in a match against Sonny Kiss.

On the May 11, 2022 episode of AEW Dynamite, KM would appear as a security guard in a contract signing between MJF and Wardlow for a match at Double or Nothing.

In Rochester, New York on July 6, he would return as a part of American Top Team with Dan Lambert, for the TNT Championship match between Scorpio Sky and Wardlow.