[9] On June 14, 2018, Fasching was traded, after two full seasons with the Sabres, to the Arizona Coyotes in exchange for Brandon Hickey and Mike Sislo.

[10] On August 23, 2022, having left the Coyotes as a free agent, Fasching signed a one-year, two-way contract with the New York Islanders.

[11] Fasching was called up from the Bridgeport Islanders on December 1, 2022, and became a regular in the lineup, scoring 10 goals for the team through the 2022-23 season.

Fasching represented the United States in the 2012 World U-17 Hockey Challenge, winning a silver medal.

He played for the United States men's national junior ice hockey team at the IIHF World U20 Championship in both 2014 and 2015.