"As part of the strict regulation of the sport, and as a safety precaution to our athletes, it is necessary that they undergo comprehensive pre-fight medical testing to ensure they are healthy and ready to compete.
"Preliminary tests have not cleared Brian Foster to participate in UFC 129 and further testing will not be conducted in time to clear him to compete."
That was the statement issued by the Ultimate Fighting Championship on its website in regards to the welterweight match up set for the UFC 129 in Toronto between Foster and Canadian Sean Pierson.
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.
On Tuesday, Foster confirmed the situation via his Twitter account, @brianfoster170.
"I'm sry to all my fans but I won't be fighting in Toronto, my MRI came back and u have a brain hemorrhage! I'm so sry"
As reported on MMAWeekly.com and confirmed with Foster's manager, Marc Fiore, the MRI results revealed that Foster had a leaking blood vessel in his brain that led to a brain hemorrhage.
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The presence of the hemorrhage, which is not believed to be serious, will keep Foster from being medically cleared to fight at UFC 129.
For the next six weeks, Foster will sit out of training as a precautionary measure, after which he will go back for more testing and see what the next step will be in his recovery.
Brain hemorrhages can vary especially in degree of severity. Remedies are varied in relation to type and can require anything from surgery to just simple medication to reduce swelling.
Fiore doesn’t believe Foster will require any serious medical attention, but intends to follow the situation with close medical supervision.
For those unfamiliar with Brian Foster, he has a career MMA record of 17-5. This would have been his sixth fight under the UFC banner.
He was coming off back-to-back victories in the Octagon, the last against Matt Brown at UFC 123 Rampage vs. Machida on Nov. 20, 2010.
He's 3-2 in UFC competition and trains out of Granite City, Ill., at Finney's H.I.T. Squad, a facility once owned by UFC welterweight champion Matt Hughes.
In regards to the matchup itself, the UFC had this to say:
"Due to injury, welterweight Brian Foster has been removed from his UFC 129 bout against Sean Pierson. A replacement opponent for the April 30th match in Toronto is currently being sought."
Elliott Saltares is a sports pundit, fan, and contributing writer for Bleacher Report. You can follow him on twitter @elliottsaltares.