Cossa, 18, posted a dominant Western Hockey League season with the Edmonton Oil Kings in 2020-21, leading the league in both goals-against average (1.57) and save percentage (0.941), while tying for the league lead in shutouts (4) and ranking second in wins (17) among his 17-1-1 record. Cossa's season ranks among the best in WHL history, posting the third-lowest goals-against average and third-best save percentage in the history of the league. As a WHL rookie in 2019-20, Cossa posted a 21-6-3 record, 2.23 goals-against average, 0.921 save percentage and four shutouts.
The 6-foot-6, 210-pound goaltender was the NHL Central Scouting Bureau's top North American goaltender for the draft, and he was the first goaltender off the board. Born in Hamilton, Ontario, and raised in Fort McMurray, Alberta, Cossa is one of five goaltenders recently named to Hockey Canada's development camp for the 2022 IIHF World Junior Championship. Prior to joining the Oil Kings, Cossa played the previous three seasons (2016-19) with the Fort Saskatchewan Rangers in the Alberta minor hockey ranks, notably winning a league championship, top goaltender and most-valuable player honors in 2016-17.
