Mulder was born June 14, 1994 in Etobicoke, Ontario. He's the son of Randy Mulder and Jennifer Gignac, and has one sister, Cynthia. Mulder played high school ball at Catholic Central, where he also competed in football and track and field. In addition to being named a two-time MVP in his basketball league, Mulder also won a city championship in the high jump. He graduated high school as a top-10 basketball prospect in Canada, but turned down a Division I offer from Detroit Mercy and attended Vicennes University (JUCO) instead. You can follow Mulder on Twitter @Mychal Mulder or on Instagram @mikemulder11.