Nash attended Lawrence Woodmere Academy in Woodmere, New York, where he averaged 17 points, 14 rebounds, 5 assists and 3 blocks during his senior season. Nash helped lead his team to three consecutive regional championships during his sophomore, junior and senior campaigns and earned All-Long Island first-team honors. Nash played college basketball for University of Notre Dame's Fighting Irish, where he averaged 9.5 points and 5.9 rebounds and 2.6 assists per game in his senior year.
Professional career
Tübingen (2011–2014)
Nash went undrafted in the 2011 NBA Draft. On July 6, 2011, Nash signed with the German team Walter Tigers Tübingen for the 2011–2012 season. That season, on March 21, 2012, Nash signed a two-year contract extension with Tübingen. In his second season with the team, Nash participated in the 2013 BBL Slam Dunk Contest.
Rouen (2014–2015)
On June 22, 2014, Nash signed with the French team SPO Rouen Basket for the 2014–2015 season, alongside his former teammate Daequan Cook. However, on August 24, 2014, he parted ways with Rouen due to a leg injury that occurred while playing for the New Orleans Pelicans in the 2014 NBA Summer League. On January 19, 2015, Nash returned to Rouen for the remainder of the season.
On July 4, 2017, Nash signed with the Turkish team Akhisar Belediyespor for the 2017–18 season. In November 2017, he parted ways with the team after appearing in five league games.
Return to Nahariya (2017–2018)
On November 10, 2017, Nash returned to Ironi Nahariya for a second stint, signing for the rest of the 2017–18 season.
Prienai (2018)
On October 29, 2018, Nash signed a one-year deal with BC Prienai of the Lithuanian Basketball League. In December 2018, he parted ways with Prienai after appearing in two league games.
Rasta Vechta (2018–2019)
On December 8, 2019, Nash signed with Rasta Vechta for the rest of the season. In 18 games played for Rasta Vechta, he finished the season as the league third-leading in field goal percentage, along with 10 points and 5.1 rebounds per game. Nash helped Rasta Vechta reach the 2019 BBL Playoffs as the fourth seed, but they eventually were eliminated by Bayern Munich in the Semifinals.
Nash was a member of the Notre Dame Fighting Alumni team that competed in the inaugural The Basketball Tournament, a winner-take-all competition, winning the 2014 tournament, with Nash being named MVP. In TBT 2018, Nash suited up for Team Sons of Westwood. In three games, he averaged 11.0 points per game and 5.7 rebounds per game on 83 percent shooting. Team Sons of Westwood ALS made it to the Super 16 before falling to Team Challenge ALS.