Ryan Kuffner played parts of three season for the Gloucester Rangers of the Central Canada Hockey League from 2013 to 2015, where he recorded 115 points in 101 games. Kuffner was named the CCHL Second Star of the Month for the month of October 2014, where he recorded 11 goals and 12 assists in 11 games. During the 2014–15 season, Kuffner recorded 33 goals and 37 assists in 49 games, and helped lead the Rangers to their first CCHL playoff appearance.
College
Kuffner began his collegiate career for the Princeton Tigers during the 2015–16 season. He recorded five goals and 15 assists in 31 games, leading the team in scoring with 20 points. Following his outstanding freshman season, he was named to the ECAC Hockey All-Rookie Team. During the 2016–17 season, he recorded 19 goals and 17 assists in 34 games, leading the team in scoring with 36 points. During the 2017–18 season, he recorded 29 goals and 23 assists in 36 games, ranking second on the team in scoring with 52 points. He ranked second in the nation in goals per game and fifth in the nation in points per game. He had a 13-game point scoring streak of 18 goals, 13 assists and 31 points. He recorded his first career hat-trick on February 2, 2018 against St. Lawrence. He was subsequently named the ECAC Player of the Week and NCAA 1st Star of the Week. He led the nation in scoring during the week, scoring six goals and three assists in three games. Kuffner was named the ECAC HockeyPlayer of the Month for the month of February 2018. He recorded 10 goals and six assists in eights games, including two hat-tricks. During the 2018 ECAC Hockey Men's Ice Hockey Tournament, he recorded four goals and seven assists to help Princeton win the tournament championship, and receive an automatic bid to the 2018 NCAA Division I Men's Ice Hockey Tournament. Following an outstanding season, he was named to the All-ECAC Hockey Second Team and named an AHCASecond Team All-American. During the 2018–19 season, he recorded 22 goals and 22 assists in 31 games. His 22 goals led the ECAC, and ranked fourth in the NCAA, while his 1.42 points-per-game led the mation. On February 2, 2019, Kuffner recorded his 68th career goal, becoming Princeton's all-time leading goal scorer, surpassing the previous record of 67 goals set by John Cook in 1963. Kuffner was named the ECAC Hockey Player of the Month for the month of March 2019. He led the league in scoring with six goals and seven assists in eights games. Following an outstanding season, he was named to the All-ECAC Hockey First Team and AHCA First Team All-American. He became the first player in Princeton program history to earn two All-America honors since the award was created in 1947–48. He finished his career at Princeton with 75 goals, and 77 assists in 132 games, ranking second-all time in points and first in goals.