The franchise started in
Kansas City, Missouri as the Kansas City Sizzlers, then moved to
Topeka, Kansas, before finally relocating to
Yakima, Washington. In 1990, the team was purchased by Sacramento attorney Robert Wilson and was led By GM Brooks Ellison. Ex-Major League Baseball player Ted Bowesfield was hired as an adviser. Dianne LaBissionaire, Pat Beehler, and Jay Mahn conducted day-to-day operations. A local contest to select a name was held, and the Yakima Sun Kings was chosen, replacing the old name, "Sizzlers". The team hired local favorite Dean Nicholson as coach. Dennis Rahm became the play-by-play radio announcer and handled media releases. The Sun Kings was the first team to show a profit in the history of the CBA. The team was fairly successful historically, given the inconsistent nature of minor-league basketball; they won the 1994–95, 1999–2000, 2002–03, 2005–06 and 2006-07 CBA championships. The Sun Kings had a disappointing 2003–04 season when they posted a 10–38 record. They were also 0–9 against the CBA Champion
Dakota Wizards.
Ronny Turiaf, a draft pick of the
Los Angeles Lakers in 2005, played nine games for the Sun Kings in the 2005–06 season, less than six months after undergoing open-heart surgery which caused the Lakers to void his contract. He averaged 13 points in nine games with the team before re-signing with the Lakers in January 2006. The Sun Kings won their fourth CBA Championship with a 111–101 victory in Game 3 of a best-of-3 finals series against the
Gary Steelheads on March 27, 2006. In 2006–07 the Sun Kings repeated as champions, sweeping the
Albany Patroons three games to none. On April 10, 2008, the Yakama Nation shut down team operations due to financial losses. On September 29, 2017, it was announced that the Yakima SunKings would be one of the founding franchises of the North American Premier Basketball. In October 2017,
Paul Woolpert was rehired as its head coach and general manager. The team won the inaugural championship. The league became
The Basketball League in 2019 and Woolpert left the team. The SunKings then removed itself from the league before the 2020 season as most of the western teams had folded. In Fall of 2025 it was announced that the team returned under new ownership for the 2026 season. ==Current roster==