Tim Hague had fought in four boxing bouts since moving from UFCFormer UFC fighter Tim Hague has died aged 34 after being knocked out in a boxing bout in Canada on Friday.
The Canadian, who fought in UFC from 2009 to 2011, was knocked down five times in the first two rounds against Adam Braidwood before it was stopped.
"It is with incredible sadness, sorrow and heartbreak to report that Tim has passed away," his family said in a statement on Sunday.
Hague beat Pat Barry on his UFC debut but went on to lose his other four fights.
He held a similar record after moving to boxing, starting with victory over Patrick Graham, then losing the following three bouts, including two knockouts against fellow Canadians Mladen Miljas and Braidwood.