Snowmobiler Caleb Moore is fighting for his life in a Colorado hospital following a horrific crash at the Winter X Games in Aspen last Thursday.
"Caleb is not doing good at all," Caleb's grandfather Charles Moore told the Denver Post. "The prognosis is not good at all. It's almost certain he's not going to make it."
The 25-year-old Texas native missed a backflip during the freestyle finals last week, with the snowmobile crashing on top of him and knocking him unconscious.
"Caleb is in critical condition and is being closely monitored," family spokeswoman Chelsea Lawson told the Denver Post.
He was rushed to Aspen Valley Hospital with a concussion where doctors discovered bleeding around his heart. He was quickly flown to Grand Junction where doctors performed emergency heart surgery Friday morning.
While recovering in intensive care for a heart contusion, a family spokesperson said the cardiac injury led to "a secondary complication involving his brain."
There have not been any deaths at the Winter X Games in its 17 years of competition.
Colten Moore, Caleb's brother, was also injured during the event last Thursday and was admitted overnight at Aspen Valley Hospital for treatment of a pelvis separation that won’t require surgery.