Matthew Richard Ryan was born in April of 1997 in White Plains, New York. He is the son of Richard and Laurie Ryan and has an older sister and a younger brother. For high school, Ryan attended Iona Prep in New Rochelle, New York. As a senior, he led Iona to their first Class AA Archdiocesan Championship and averaged 20 points, eight rebounds and five assists per contest. Ryan started his college career at Notre Dame, but received limited playing time for the Fighting Irish. In the summer of 2017, Ryan transferred to Vanderbilt. After sitting out the 2017-18 season, Ryan started 25 of 29 games for Vandy in 2018-19 and averaged 24.9 minutes of run per game. He also hit 2.0 three-pointers per contest for the Commodores. Ryan then graduated from Vanderbilt with a degree in Economics. For the 2019-2020 season, Ryan was a graduate transfer at the University of Tennessee at Chattanooga. Ryan delivered 15.4 points, 4.9 rebounds and 2.7 made three-pointers per game for the Mocs. Ryan then went undrafted in the 2020 NBA Draft. In 2021-22, Ryan played in 28 games for the G League's Grand Rapid Gold, before signing a two-way contract with the Boston Celtics.