Legendary NBC sports broadcaster Dan Hicks died unexpectedly at the age of 64, his wife, longtime ESPN personality Hannah Storm, announced Thursday. Hicks passed away following an acute illness.

Storm called his death "unexpected" in a social media post. Hicks, who had a 34-year career at NBC, was reportedly "at the top of his game" both professionally and personally, according to Golf Channel host Rich Lerner.

"Dan was 64 going on 44," Lerner said. "Top of his game still: The Players Championship, U.S. Open, Ryder Cup, Olympic swimming and skiing. He was active, in shape, highly successful, fully engaged man in his later prime with little to prove. Enjoying his work, his life with his beautiful and equally talented wife, Hannah Storm and their three daughters."

Hicks was scheduled to call the Notre Dame-Boston College football game on Saturday in South Bend, Ind., for NBC and Peacock. He had been the primary voice for NBC's golf coverage for the past 26 years, also covering Olympic events and Notre Dame football.

Hicks' final game was Oct. 10, when Notre Dame defeated Stanford. The following day, he attended the Chicago Marathon to support his daughter Riley. Earlier in October, he attended the Hannah Storm Foundation's 10th annual celebrity dinner and, in August, enjoyed the Outlaw Music Festival Tour and the U.S. Open tennis tournament.

Storm stated, "He was a devoted husband of over 30 years, loving father of our three daughters, and cherished friend to so many. His loss is immeasurable."

"Dan was truly one of a kind, and quite simply, the person everyone wanted to be around," she added. "When he walked into a room, he brought the energy, the laughter and the people together. He was endlessly kind, thoughtful and funny, and he made everyone feel like they mattered."

Storm did not disclose the official cause of death.