Jeff Webb, known as the “founder of modern cheerleading” for his role in turning the activity into a competitive sport, died Thursday following “a tragic accident,” a family spokesperson said Tuesday. He was 76.

A former yell leader for the University of Oklahoma cheerleading squad, Webb went on to form several organizations — including Varsity Spirit, the Universal Cheerleaders Assn. and the International Cheer Union — that helped him reshape what was once largely a sideline activity into an International Olympic Committee-recognized sport that features elements of gymnastics, stunts and dance.

Cheer Daily reports that an email sent by Varsity Spirit president Bill Seely to the company’s community said that Webb fell while playing pickleball earlier this month and suffered a severe head injury.

Webb was buried in a private ceremony for family on Sunday. A larger celebration of life will be held at a later date.

“Our father was, at his core, a man of inexhaustible energy, and he poured that energy into everything he did, from revolutionizing cheerleading to his never-ending — and constantly growing — list of activities,” Webb’s children said in a statement.

An avid outdoorsman, Webb managed a farm and hunting lodge and enjoyed offshore fishing and boating. He was also a pilot, author, publisher and guitar player.

“He brought that same spirit of dedication and encouragement to being a father and grandfather,” his children added. “To most people he is a legendary entrepreneur — to us, he was our soccer coach and on-demand comedian, our mentor and father-daughter dance partner, our solace and our source of strength.

“He taught us by example that a life well lived contains balance, that seriousness and silliness are not in fact opposites, that focus and discipline do not and should not preclude care and kindness.”

Through his organizations, Webb established hundreds of cheerleading competitions — including national championships that have been broadcast on ESPN for decades — and training camps. He was a pioneer in the manufacturing and marketing of cheerleading apparel and equipment and also played a role in establishing safety guidelines for the sport.

“The founder of modern cheerleading, [Webb] spent his life building the sport he loved and advocating for young people everywhere,” the International Cheer Union wrote on Facebook. “Our thoughts are with his family, friends and the entire global cheer community.

Varsity Spirit wrote on Instagram: “Join us in honoring the life and legacy of Jeff Webb, founder of Varsity Spirit and modern cheerleading. His impact has built a community that will continue to inspire generations to come.”

The Varsity Spirit post included a tribute video that featured an audio clip of Webb discussing the instant he realized just how much of an impact his efforts had on the sport.

“I was at UCA High School Nationals, and I looked out there — everybody had a smile on their face,” Webb said. “People think this is a little corny, but I had this almost epiphany experience. And it was just this emotion that came over me. It was, how lucky am I? How fortunate have I been to be able to have this idea and to build on it and have fabulous people kind of hook their star to my vision and for us together to build this great thing?”

Webb is survived by his wife, Gina, and his children, Jeffery and Caroline, and two grandchildren.