圣胡安骑士

First incarnation (1999–2001)

The San Juan Knights were founded in 1999 by then-mayor and current senator Jinggoy Estrada and businessman Sandy Javier. The team entered the Metropolitan Basketball Association as an expansion team for the league's 1999 season alongside the Surigao Miners and Nueva Ecija Patriots.

During the pre-season, the team acquired 6'9" Bonel Balingit from the Philippine Basketball Association to a three-year, P16 million contract. Joining Balangit are Gherome Ejercito from the Pampanga Dragons, a cousin of Estrada, 1998 NCAA Most Valuable Player Christian Calaguio, and Chito Victolero.

During the playoffs of the 2000 season, San Juan first swept the Laguna Lakers, 2–0, in the Northern Conference Semifinals and went past the Manila Metrostars, 3–1, in the Northern Conference Finals, bringing the Knights to the 2000 MBA National Championship. Game 5 of the championship series against the Negros Slashers had a debris-throwing incident at the La Salle Coliseum in Bacolod, Negros Occidental, as the Knights were way ahead, 87–65, with 11:38 left in the fourth quarter when play was stopped. The Negros Slashers conceded game 5, giving the San Juan Knights a 3–2 heading into game 6. San Juan would go on to win their first of back-to-back MBA championships.

Second incarnation (2018–present)

Maharlika Pilipinas Basketball League

In April 2018, San Juan Knights were revived as an expansion team in the Maharlika Pilipinas Basketball League. The return of the Knights brought in names such as Mark Cardona and John Wilson. The team finished its inaugural season with a 20–5 record and clinched the third seed in the playoffs. In the playoffs, San Juan swept both Navotas and Quezon City, and won 2–1 against Manila to advance to the 2019 MPBL Finals against the Davao Occidental Tigers. The series went all the way to a game 5 as San Juan won its first MPBL championship and the third overall in franchise history. Their winning traditions continued into the 2019–20 season, after facing only four losses throughout the whole season, San Juan managed to finish the season as the North Division's first seed. With a 26–4 record and a .867 win percentage, they also tied for best record that season alongside the Davao Occidental Tigers. As the playoffs began, the team swept through Pasay and Pampanga before facing the Makati Super Crunch in the North Division Finals. The series was tied before the season's suspension but San Juan were able to win deciding game 3 against a depleted Super Crunch squad to make back-to-back National Finals appearances for a chance to repeat against the Davao Occicdental Tigers. This time around, San Juan failed to defend their title as Davao Occidental won 3–1.

Pilipinas Super League

After the conclusion of the 2022 MPBL season, San Juan made their debut in the Pilipinas Super League, under the name San Juan Kings. In the 2022–23 DUMPER Cup, the team went undefeated in the regular season, winning all 15 games. After beating Manila in the Quarterfinals, the Kings met the Baltazar-led Pampanga G Lanterns in the Semifinals. Unfortunately, San Juan would lose to the G Lanterns in two games.