Shannon Murray

REMEMBERING KYLE BUSCH -- Tributes are pouring in for NASCAR Driver Kyle Busch, after his sudden death at age 41, including from Dale Earnhardt Jr. He wrote:

"Kyle was one of the greatest drivers in NASCAR history. No one can deny that. But he was also a father, a husband, brother, son, and a friend to many. My heart is broken for the Busch family. I will never be able to make sense of this loss but I am thankful that we had found a way to become friends."

Busch was hospitalized earlier on Thursday with an unknown illness and was undergoing treatment..

During a Cup Series race on May 10 at Watkins Glen, Busch radioed in to his crew requesting medical aid and a "shot" after the race.

According to the TV broadcast, Busch had been struggling with a sinus cold that was exacerbated by the intense G-forces and elevation changes at the Upstate New York road course.

Busch continued to race and finished eighth.