Renowned snowmobile freestyler Caleb Moore has died from injuries he suffered in a crash at the Winter X Games a week ago.

The 25-year-old Moore was knocked unconscious in the crash and was evaluated for a concussion and other injuries. While he was being evaluated, it was discovered that he was bleeding around the heart and was airlifted to Grand Junction, Colo. for emergency heart surgery. A couple of days later doctors discovered a secondary complication involving his brain. Moore was unable to recover from his injuries and passed away Thursday morning.

“He will be truly missed and never forgotten,” the Moore family said in a statement. “The family wishes to express their deep gratitude for all the prayers and support they have received from all the fans, friends and family around the world that Caleb has inspired.”

Yamaha snowmobiles had a successful Jan. 26-27 race weekend in everything from the snowy X Games in Aspen, Colo. to frigid cross-country competition in Minnesota and Maine.

Leading the charge for Yamaha was Doug Henry, formerly a motocross champion and now a snowmobiling inspiration, who led most of the X Games SnoCross Adaptive race aboard his FX Nytro RTX before ultimately finishing a close second. In Minnesota, Ben Lindbom won the 50-mile USXC Semi Pro Improved event, while in Maine, Erik Frigon grabbed a strong third in the 20-mile USSC East Pro Open race, both aboard Nytro RTXs.

Henry rewrote the motocross rulebook when he won the 1998 AMA Motocross title on Yamaha’s YZ400F four-stroke. After suffering a career-ending spinal injury in 2007, he then rewrote the rulebook for handicapped athletes by outfitting a Yamaha snowmobile with a special shock-absorbing seat to race snocross. After taking a bronze in X Games 14, this weekend Henry returned to Aspen and led nearly the entire final aboard his specially outfitted sled before finishing second to Mike Schultz and claiming a silver medal.

“My Yamaha gave me a great start and put me out front, and after that I just tried to have fun,” says. Henry. “Thanks to Yamaha Snowmobiles for getting me the equipment and to ESPN for putting on the event.”

Tucker Hibbert and his team celebrate his sixth straight X Games gold medal. (photo courtesy John Hanson)

It was a gold-medal weekend for Team Arctic Racing, with emphatic wins by Tucker Hibbert at the ESPN X Games.

Hibbert’s historic seventh gold was also his sixth in a row, the first X Games athlete to achieve this feat. When the then-15-year-old catapult himself into the world spotlight by winning his first X Games gold in the year 2000, it was clear that Hibbert was destined for further snocross greatness. Including his seven gold medals, Hibbert has won 11 medals in his X Games career.

Team Arctic racers Derek Ellis and Logan Christian earned eighth and 14th finishes in the Snocross final; Cory Davis took a silver medal in Speed & Style, a fourth in Best Trick and fifth in Freestyle; and Chris Heppding scored seventh in Snocross Adaptive.

Ski-Doo riders had a successful weekend at the Winter X 2013, earning seven medals in the snowmobile competitions.

Joe Parsons topped all snowmobile competitors, collecting medals in each of the three events he entered, including silver in Freestyle and Best Trick. Parsons stepped up his game to carry the torch when his teammate and defending Best Trick winner Heath Frisby suffered two hard practice crashes on Thursday.

Frisby was forced to withdraw from the Freestyle competition and limped through the Speed and Style event, in which Parsons earned the bronze medal. Frisby did take part in Best Trick on Sunday night and appeared to have a winning run when he threw out his signature Underflip, but judges saw it differently. In his second run, Frisby tried to raise the bar even higher with a variation, but was unable to land the trick. Still, Frisby earned a bronze medal for his efforts. Parsons then unleashed his Gator Wrestler backflip and added a new twist by landing it backward to the roar of the crowd, earning the silver.

Caleb Moore’s condition has worsened after a crash on Thursday at the X Games.

According to a report on ESPN.com, Moore was knocked unconscious in the crash and was evaluated for a concussion and other injuries. While he was being evaluated, it was discovered that he was bleeding around the heart and was airlifted to Grand Junction, Colo. for emergency heart surgery. Unfortunately, doctors discovered another issue on Sunday.

“Caleb continues to be monitored in ICU. His cardiac injury has led to a secondary complication involving his brain” the Moore family says in a statement. “The Moore family thanks all of Caleb’s fans and friends for their support and for respecting their privacy.”

On Monday the Denver Post reported that Moore was in desperate condition at St. Mary’s Hospital in Grand Junction, Colo.

“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.”