Posted by Sabrina B. @gametimegirl

Welterweight Brian Foster is out of his UFC 129 fight against Sean Pierson on April 30 because of a brain hemorrhage, the 27-year-old fighter announced Tuesday through his Twitter account.

An MRI required by the Ontario Athletic Commission 60 days prior to the bout revealed a damaged blood vessel, an injury Foster believes took place during a hard sparring session before the test.

“I was dealing with a really good boxer and he caught me with a left hook that rocked me a little bit,” Foster said. “I hadn’t been rocked like that very often. I’ve never been knocked down. My record says I’ve been knocked out before but I was not unconscious in that fight.

Foster’s manager, Marc Fiore, forwarded the MRI results to UFC physician Dr. Jeff Davidson, who made the call to pull the fighter from the event at Toronto’s Rogers Centre. Foster was informed Tuesday morning.

“When you hear something like that you think of the worst. I’m glad we got that scan,” Fiore said. “Brian’s a fighter. He’s young and has that attitude that he’ll fight no matter what. But it’s not the right thing to do. I want him to be a father to his kids for a long time.”

Foster will undergo an MRI in six weeks to determine whether or not he’s fit to fight. The camp hopes the broken vessel will be completely healed and he will be cleared to compete. This is the first time Foster has dealt with a brain-trauma issue, Fiore said.

WRITTEN BY osh Gross covers mixed martial arts for ESPN.com & FULL STORY HERE