Holohan last fought in his home country, losing via submission in exciting fight to Louis Smolka at UFC Fight Night 76.
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“I was born with a factor missing in my blood called Factor XIII,” Holohan told UFC.com. “I never disclosed it then or now. I can no longer pass the medical requirements to compete.”
Holohan joined the UFC in July of 2014, going 3-2-0. He earned a Fight-of-the-Night award in his fight against Chris Kelades at UFC Fight Night 54 in Halifax, Nova Scotia.