[11] He made his NHL post-season debut in Game 6 of the Eastern Conference Final against the Pittsburgh Penguins on May 23.

[14] On October 5, 2021, White sustained an upper-body injury five minutes into a pre-season game against the Toronto Maple Leafs after a collision with David Kämpf.

[16] On the opening day of free agency, White was signed to a one-year, $1.2 million contract with the Florida Panthers on July 13, 2022.

[17] He finished the season with eight goals and fifteen points in 68 games and was a restricted free agent following its conclusion.

However, the Panthers chose not to give him a qualifying offer and instead let White become an unrestricted free agent on July 1, 2023.

[19] He was invited to training camp and was one of five forwards working for the final two spots on the roster after the penultimate round of cuts.

[22] White was limited to 21 games in the AHL due to injuries, scoring five goals and ten points.

[24] Following an 11-game stint with the Penguins in which he was held pointless, White was claimed off waivers by the Montreal Canadiens on February 22, 2024.

[29] He competed as a member of Team USA at the 2015 IIHF World U18 Championships, where he scored the overtime game-winning goal to defeat Finland in the gold medal game.

[33] After the Senators failed to qualify for the 2018 Stanley Cup playoffs, White was named to represent Team USA's 2018 IIHF World Championship roster.

[35] On April 19, 2019, White was selected to represent Team USA at the 2019 IIHF World Championship, held in Bratislava and Kosice, Slovakia.