Ron Harper Jr. got the first NBA start of his career on Feb. 2, 2026, and Boston needed him in a hurry. With Jaylen Brown and Sam Hauser out on the second night of a back-to-back, the Celtics turned to a two-way player who had spent much of the season bouncing between brief NBA minutes and heavy G League duty.
The timing mattered because Harper had spent months waiting for this kind of chance. He joined Boston on Aug. 16, 2025 on an Exhibit-10 deal, won a two-way contract on Oct. 16, and then kept proving he could score at the lower level, where he averaged 26.9 points on 49.7% shooting in eight Tip-Off Tournament games for the Maine Celtics. In Boston, though, he was still a margin player, averaging 1.9 points in seven games from October to January while playing just 5.0 minutes a night.
That split between the G League and the NBA has defined Harper’s climb. He went undrafted out of Rutgers in 2021, spent his first two NBA seasons with Toronto and appeared in only 10 games there, then moved through Boston and Detroit before circling back to the Celtics. Detroit waived him on July 24, 2025, after he had averaged 16.2 points, 3.9 rebounds and 2.2 assists in the G League and shot 39% from 3-point range, numbers that showed he could produce even when the NBA call-up lagged behind.
Boston had already seen the upside. Harper averaged 4.3 points in three preseason games at 42.9% shooting from three, then erupted for the Maine Celtics in November, when he was named Player of the Week after a two-game burst that included 36.0 points, 7.0 assists and 6.0 rebounds a night. On Nov. 21, he scored 46 points against the Delaware Blue Coats, hit a game-winning layup with 1.1 seconds left and went 16-for-26 from the field. That was the version of Harper Boston was betting on when it finally needed another body in the rotation.
Harper said being with Boston the year before helped him pick up the system faster, and that familiarity likely made him a cleaner emergency fit when the Celtics had to go short-handed. What remains unresolved is whether Feb. 2 was a one-night assignment or the start of a larger role. For a player who spent so long waiting between opportunities, the first start was proof he had forced his way back into the conversation.
