WASHINGTON  Brian Frederick might be the country’s most important sports fan, but he rarely wears the colors of his favorite teams or can be heard cheering them on.

Frederick, a boyish and lanky 35-year-old, was dressed in a charcoal-gray suit and a tie on a recent weekday. Between meetings with F.C.C. commissioners and the National Taxpayers Union, he sat in a soundproof studio of Sirius XM. He was a guest on a sports talk show, cheerleading through a microphone to an unseen audience.

“We’re fighting to give fans a voice in public policy issues,” Frederick said.

That is part of his stump speech as the newly named executive director of a year-old nonprofit interest group, the Sports Fans Coalition. Frederick’s mission: to find (the easy part) and organize (the hard part) a diverse and unwieldy group of dedicated but often disenfranchised people known as American sports fans and turn them into a unified, political power.

“A lot of people say they don’t think that sports and politics should mix,” Frederick said. “Well, they’re already mixed. And fans are the ones without a spot at the table.”