17/06/2017 11:59 AM AEST | Updated 17/06/2017 12:06 PM AEST

Aussie Bull Rider 'Not Doing Real Good' After Nightmare Rodeo Accident

Bradie Gray remains critical in a US hospital.

Facebook/PBR Australia
Bull rider Bradie Gray has been severely injured at a U.S. rodeo.

A NSW man is fighting for life in hospital after suffering critical injuries in a bull riding accident at a U.S. rodeo.

Bradie Gray suffered the life-threatening injuries when a bull threw him and stepped on his chest at a rodeo in the U.S. state of Wyoming on Thursday night, local time, the Casper Star-Tribune reports.

The 20-year-old from Hallsville, near Tamworth, is said to have been placed in a medically induced coma following the accident during the College National Finals Rodeo in Casper.

The Star-Tribune reports that doctors at the Wyoming Medical centre treated Gray for broken ribs and a bruised aorta.

"He's not doing real good," Odessa College rodeo coach C.J. Aragon told the Star-Tribune.

"When he got to the hospital last night, he had no pulse, no heartbeat and no blood pressure. One of the doctors told me last night that there was a 60 percent chance that he wasn't going to come out (of the hospital) alive."

Gray reportedly underwent emergency surgery on Friday at Wyoming Medical Center and remains in a critical condition.

Gray is one of a small number of Aussie competitors at the college finals who have moved to the US to try and make their rodeo dreams come true.

A junior at the Odessa college in Texas, Gray told the Star-Tribune earlier this week that he was returning his fifth serious injury of his college rodeo career.