The men's 91 kg muaythai[a] event at the 2022 World Games was held from 15 to 17 July 2022 at the Boutwell Memorial Auditorium.

[4] Like all World Games muaythai events and other martial arts events, the competition is a straight single-elimination tournament.

Both semifinal losers compete in a bronze medal match.

A Muay Thai practitioner may win by referee stop contest, knockout or by points.

The Muay Thai practitioner with the higher score from a majority of the judges is the winner.