Dach, a center from Fort Saskatchewan, Alberta, had a breakout season with the Saskatoon Blades in 2018-19 by scoring 73 points (25 goals, 48 assists) in 62 games. NHL Central Scouting ranked him No. 2 among North American skaters before the 2019 NHL Draft, and the Chicago Blackhawks made him the No. 3 pick.
With the Blackhawks starting the 2019-20 season against the Philadelphia Flyers in Prague, they opted to have Dach begin his pro career with Rockford of the American Hockey League. But he was in the NHL shortly afterward, making his NHL debut with the Blackhawks against the Washington Capitals on Oct. 20, 2019, and scoring his first NHL goal against the Vegas Golden Knights two days later.