Former UFC lightweight title challenger and welterweight fan favorite Donald "Cowboy" Cerrone was rushed into surgery earlier this week after suffering an injury while practicing riding a bull.  

Cerrone was schedule to attempt to ride Dana White's bull "Twisted Steel" at Professional Bull Riders (PBR) “Unleash The Beast” event on May 18 at AT&T Stadium in Arlington, Texas.  Instead, Cerrone will be recovering from surgery.  

“As y’all know I was set to ride Dana White’s ‘Twisted Steel’ at the PBR World Finals on May 18,” Cerrone wrote on Instagram. “I was just rushed into surgery with 100-percent biceps tear off the bone! Guess you mess with the bull you sometimes get the horns. This is not the end. I will rehab and get back after it.”

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In a followup post, Cerrone explained that UFC CEO Dana White lined him up with a surgeon who specializes in full bicep tears.  

'Well if y’all want to see what happened to the one arm man, this is it. Now if you’re thinkin this is it, and ol’ cowboy is down and out— no sir. @danawhite hooked me up with one of the best surgeons for a full bicep tear and give it six-eight weeks and with help from @transcendHrt and I’ll be back at it," Cerrone wrote. 

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 White released a statement about Cerrone's injury and thought "Cowboy" trying to ride his bull was probably not the best idea from the beginning.  

“I thought this was a bad idea for Cowboy from the start,” White said in a statement provided to MMAmania.com. “Twisted Steel is the nastiest bull in the PBR. He’s bucked 90-percent of his riders. Let’s leave it to the pros at the PBR World Finals in Arlington.”