Early reports say 36 of 37 people on board are dead. Very tragic and God bless the friends and family of those who died.
Feel free to correct me, but I don't know of a incident like this involving a pro or college hockey team. There have been aviation incidents where most or all of a sports team were wiped out. In most cases in the Americas or involving Americans, the teams were amatuers(The U.S. Figure Skating team aka Sabena Flight 548 disaster in 1961 or college teams like Marshall, University of Evansville, Wichita State) to name a few, involved college athletes.
Overseas is another story. In 1958 members of the Manchester United football were killed in a crash in Germany, the famous 'Alive' story involved uruguayan rugby team players. A Zambian soccer team was wiped out in a crash about 10 years ago. I recall a crash involving Italian athletes about 40-50 years ago but I forget the details. There have been other crashes.
Pro sports teams have to travel and with plane travel there is a risk. RIP to those who died today.