Pat Bowlen, the influential hands-on owner of the Denver Broncos, which won all three of its Super Bowl titles under his long stewardship, died on Thursday night at his home in Englewood, Colo. He was 75.

Mr. Bowlen’s family announced his death in a statement. He publicly acknowledged in 2008 that he had memory loss and in 2014 that he had Alzheimer’s disease. Mr. Bowlen had had no role in running the team since 2014.

But in the decades after he bought the Broncos, in 1984, for $70 million, a record at the time, Mr. Bowlen had one of the most successful runs of any team owner in American professional sports. In the first 15 of his 35 years at the helm, the Broncos, who had done far more losing than winning in their first 24 seasons, won seven division titles and five conference titles, and consecutive Super Bowls in 1998 and 1999. The team won its third N.F.L. title in 2016.

Under his ownership, the Broncos continued to sell out every home game — a streak that began in 1970 — even as the team increased the seating capacity in Mile High Stadium by 50 percent. Mr. Bowlen lobbied the local government to pay about 70 percent of the cost of a new stadium, which opened in 2001, and the sellouts have continued.