Jackie Neil says in a statement on behalf of her family that Tim Hague died on Sunday.
He was competing against former Edmonton Eskimos defensive end Adam Braidwood at the Shaw Conference Centre on Friday evening in an event promoted by KO Boxing.
A video on YouTube that purports to be of the fight shows Hague lying still on his back on the canvas after taking a punch to his head from Braidwood.
Ed Kaiser / Postmedia NetworkAdam Braidwood (right) punches Tim Hague during their boxing match in Edmonton on June 16.
A heavyweight trained in jiu-jitsu, Hague put his teaching career on hold to make his pro MMA debut in 2006.