[2][5][6] Quinn won the doubles at the 2022 USTA Boys 18s National Championship with his partner Nicholas Godsick which earned them a wildcard into the main draw of the 2022 US Open.

They won the final with a 6–4, 6–0 defeat of Sebastian Gorzny and Alex Michelsen who had been top seeds following their 2022 Wimbledon Junior doubles victory.

[8] In the first round of the qualifying event at Flushing Meadows, Quinn defeated his higher ranked opponent Ernesto Escobedo with a 5–7, 6–4, 6–4 victory.

[12] Having also received a wildcard for the qualifying event, he reached the main draw at the 2024 BNP Paribas Open making his Masters debut.

[18][19] Following reaching the final at the 2025 Canberra Tennis International as a qualifier, he entered the top 160 in the singles rankings on 27 January 2025.

[20][21][3] Former French Open doubles champion Luke Jensen on ESPN commentary marked the Quinn forehand with the phrase "That’s the hammer!