Mylan's life was taken in act of violence early on Sunday morning.
"Obviously this is an extremely difficult and upsetting time for the players and staff," said Stampeders president and general manager John Hufnagel. "It's a terrible tragedy. Our thoughts and prayers go out to Mylan's family."
"The loss of this 23-year-old young man at this stage of his life and his career is an unfathomable tragedy," said Ken King, president and CEO of the Calgary Sports and Entertainment Corporation. "Our sympathies to Mylan's family and to the Stampeders family of players, coaches and staff."