[3] Ryan attended Iona Prep where he led the Gaels to a 22–6 record en route to the program's first Class AA Archdiocesan Championship while averaging 20.0 points, 8.0 rebounds and 5.0 assists per game as a senior while also being named Mr. New York Basketball.

[5] Ryan began his college career at Notre Dame, where he played sparingly before transferring to Vanderbilt after his sophomore season.

[9] Ryan joined the Cleveland Cavaliers for the 2021 NBA Summer League and spent preseason with the Denver Nuggets.

[8] He averaged 20.4 points in 14 games for the Maine Red Claws to finish the 2021–22 NBA G League season.

[10][20] On November 2, he hit a corner 3-pointer to tie the game at the regulation buzzer against the New Orleans Pelicans, with the Lakers going on to win 120–117 in overtime.

[25] On October 22, 2023, Ryan was claimed off waivers by the New Orleans Pelicans and subsequently signed to a two-way contract.

[26] On November 2, Ryan had his first NBA start against the Pistons and on April 13, 2024, he signed a standard contract with the Pelicans.