Isaiah Leonja Ross (born October 24, 1996) is an American professional basketball player who last played for Psychiko. He played college basketball for the UMKC Kangaroos and the Iona Gaels.

Ross attended Davenport West High School. As a senior, he averaged 17 points per game. Ross did a postgraduate season at Hillcrest Prep, playing alongside Deandre Ayton and Marvin Bagley. He committed to playing college basketball for UMKC.^[1]

As a freshman at UMKC, Ross averaged 8 points and 1.9 rebounds per game.^[2] He averaged 11.3 points and 3.1 rebounds per game as a sophomore. Following the season, he transferred to Iona, sitting out a season per NCAA regulations.^[3] As a junior, Ross averaged 11 points, 3.2 rebounds, and 1.1 assists per game.^[1] In the offseason, he worked on his defense and passing, improving his foot speed and lateral speed alongside Chasson Randle, and embraced new coach Rick Pitino's skills workouts. In the season opener against Seton Hall, Ross scored 23 points but "played very poorly," according to Pitino.^[4] On December 5, 2020, he scored a career-high 33 points in a 82–74 win over Hofstra.^[5] During his senior year, Ross helped Iona win the MAAC championship and reach the NCAA Tournament.^[6] He averaged 18.4 points, 3.9 rebounds, 1.4 assists and 1.4 steals per game.^[7] Ross was a unanimous First Team All-MAAC selection.^[8]

Ross was selected with the 18th pick in the 2021 NBA G League draft by the Maine Celtics. He was acquired by the Santa Cruz Warriors in a three-team trade.^[9] However, he was waived on December 8, after making 7 appearances.^[10] On December 19, he signed with the Lakeland Magic.^[11] On December 30, 2021, Ross was acquired by the Oklahoma City Blue of the NBA G League, but was later waived on January 5, 2022.^[12]

Ross graduated from Iona with a degree in communications with an emphasis in public relations.^[14]