UPDATE June 19, 7:14 a.m. EST:
Former UFC fighter Tim Hague has died at 34 after being knocked out in a boxing match Friday in Canada, the BBC reported.
Hague was able to walk out of the ring after being knocked down five times in two rounds by Adam Braidwood but fell into a coma after being taken to the hospital.
"It is with incredible sadness, sorrow and heartbreak to report that Tim has passed away," his family said in a statement issued Sunday.
ORIGINAL STORY: Former UFC heavyweight Tim Hague is in critical condition with a serious brain injury after a knockout loss in a boxing match against Adam Braidwood Friday night.
On Sunday, his sister Jackie Neil confirmed that he is still in critical condition. "Tim remains in critical condition," Jackie Neil wrote on Facebook. "There is no change. Our immediate family is all here with him. He hasn't been alone since this happened. He is receiving the absolute best care, and we are so appreciative of all the doctors and nurses."
The 33-year-old made five appearances in the UFC between 2009 and 2011. He held a 21-13 MMA record before switching to boxing. During his career, Hague suffered eight knockouts in MMA, four of which happened in the last 22 months, according to ESPN.
This photo was posted on Instagram after the match.
Hague's knockout has apparently also served as a wake-up call of sorts for other UFC fighters.
Former UFC fighter Anthony Johnson posted about Hague's knockout on Instagram, saying incidents like this led him to retire earlier this year at age 33.
"This is why I walked away," Johnson wrote. "This is a reality check for me!"