The Los Angeles Kings selected Fasching in the fourth round (118th overall) of the 2013 NHL Draft. In 87 career NHL games with the Buffalo Sabres, Arizona Coyotes and Islanders, he's recorded 22 points (11 goals, 11 assists). Fasching had a career year in the AHL in 2021-22, scoring 37 points (14 goals, 23 assists) in 51 games with the Tucson Roadrunners. In 298 career AHL games with Bridgeport, Tucson and the Rochester Americans, Fasching has 159 points (76 goals, 83 assists).