On May 4, 2018, Ball signed with the Los Angeles Ballers of the Junior Basketball Association (JBA), a new league created by his father as an alternative to college basketball, and was touted by the league as its "marquee player."[62][63] In his debut on June 21, he posted a triple-double of 40 points, 16 rebounds, 10 assists and three steals, shooting 15-of-40 from the field, in a 134–124 win over the New York Ballers.[64][65] Over eight regular season games, Ball averaged a triple-double with 39.6 points, 14.6 rebounds and 11.5 assists per game, while being named to the All-Star Game.[66] In the playoff semifinals versus the New York Ballers, he scored a season-high 55 points, 16 rebounds and seven assists.