Thomas Brad "Trey" Hillman is an American professional baseball coach. He has also served as the manager of the Hokkaido Nippon Ham Fighters in Japan's Pacific League, the Kansas City Royals in the American League and the SK Wyverns in the KBO League. Therefore, he is the only person to have served as manager in these three countries. He has also been a coach with the Los Angeles Dodgers, New York Yankees, Houston Astros, and the Miami Marlins.

The Hokkaido Nippon-Ham Fighters is a Japanese professional baseball team based in Kitahiroshima, Hokkaidō, in the Sapporo metropolitan area. They compete in the Pacific League of Nippon Professional Baseball, playing the majority of their home games at ES CON Field Hokkaido. The Fighters also host a select number of regional home games in cities across Hokkaidō, including Hakodate, Asahikawa, Kushiro, and Obihiro. The team's name comes from its parent organization, Nippon Ham, a major Japanese food-processing company.