After two solid seasons with the United States National Team Development Program, Fischer, a Chicago native, was selected by the Arizona Coyotes in the second round (No. 32) of the 2015 NHL Draft. He signed with Arizona on Aug. 20, 2015, and joined Windsor of the Ontario Hockey League, finishing with 90 points (40 goals, 50 assists) in 66 games before turning pro.

Fischer, a 6-foot-2 power forward, spent most of the 2016-17 season with the Coyotes' American Hockey League affiliate in Tucson, putting up 47 points (team-high 20 goals, 27 assists) in 57 games. He made his NHL debut on Jan. 21, 2017, and scored a goal on his first shot in Arizona's 5-3 victory against the Tampa Bay Lightning.

He scored again two nights later against the Florida Panthers on his only shot on goal, but played just one more game before being returned to Tucson. When he was recalled in late March, he scored again against the Lightning, also on his first shot, on March 26, giving him three goals on his first three NHL shots.

Fischer won a spot on the Coyotes after training camp in 2017-18 as a 20-year-old and showed good speed, a quick wrist shot and a big slap shot. At 214 pounds and still growing, he can play a physical game as well. Fischer is part of the young nucleus the Coyotes are counting on moving forward.