Mattingly was the founder and lifeblood of the Anchorage Bucs baseball team. He started the team in 1980 as the Cook Inlet Bucs, and through his efforts the team graduated from Anchorage’s adult league to the Alaska Baseball League. He served as the Bucs’ general manager for 30 years — driving the team bus, answering phones at the office, watering and mowing the Mulcahy Stadium outfield and recruiting college players from across the nation. He saw 60 former Bucs make it to Major League Baseball.