New York Knicks (2020–2023) Quickley was drafted by the
Oklahoma City Thunder with the 25th overall pick in the
2020 NBA draft, and was then traded to the
New York Knicks as part of a package for the 23rd pick,
Leandro Bolmaro, on November 20, 2020. On November 28, Quickley signed with the Knicks. In his NBA debut on December 23, Quickley scored five points and exited the game in the second quarter due to injury. He returned from injury on January 2, 2021, scoring nine points in the Knicks' 106–102 win over the
Indiana Pacers. April 3, 2022, Quickley recorded his first career triple-double with 20 points, 10 rebounds, and 10 assists in a 118–88 win over the
Orlando Magic. On March 5, 2023, Quickley posted a career-high 38 points in a 131-129 double overtime win over the
Boston Celtics. On March 27, Quickley posted a new career-high 40 points in a 137–115 victory over the
Houston Rockets. That year, Quickley finished second in the voting for the
Sixth Man of the Year Award.
Toronto Raptors (2023–present) On December 30, 2023, the Knicks traded Quickley, along with
RJ Barrett and a 2024 second-round draft pick, to the
Toronto Raptors in exchange for
OG Anunoby,
Precious Achiuwa, and
Malachi Flynn. On March 7, 2024, Quickley achieved a new career high of 18 assists and also recorded 21 points and 9 rebounds in a 120–113 loss against the
Phoenix Suns, which is tied for the 6th most in total assists by a Raptor, and it was one less rebound needed for a triple-double. On April 5, Quickley helped the Raptors break their 15-game losing streak, scoring 25 points in a 117–111 win over the
Milwaukee Bucks. On July 8, 2024, Quickley re-signed on a 5-year, $175 million contract to remain with the Raptors. In the 2024–25 NBA season, Quickley struggled with injuries, playing in only 33 games, along with being on a minutes restriction for many of the games he played in. On January 7, 2026, Quickley made a buzzer-beating three-point shot to give the Raptors a 97-96 victory over the
Charlotte Hornets. On January 20, Quickley scored 40 points (tying a career-high) on 11-of-13 shooting in a 145-127 win over the
Golden State Warriors, a performance described as the most efficient 40-point game in league history. On January 26, he was named the Eastern Conference
Player of the Week after averaging 25.3 points, 6.8 rebounds, 6.8 assists, and 2.0 steals, contributing to Toronto's 4–0 record over a road trip. ==National team career==