Glencross was small for his age, standing less than five feet tall when he was 15, and as a result was often left off the top teams in minor hockey despite having the talent to play; he played Midget C hockey in Provost. He experienced a rapid growth spurt, growing a full foot in a period of 17 months, and was recruited to play Junior A hockey for the expansion Brooks Bandits of the Alberta Junior Hockey League (AJHL) in 2000.
Glencross was petite compared to his peers, measuring under five feet tall at 15 years old, which led to him frequently being overlooked for top teams in minor hockey despite possessing the skills to play; he participated in Midget C hockey in Provost. He underwent a rapid growth spurt, increasing by a full foot over a span of 17 months, and was recruited to play Junior A hockey for the expansion Brooks Bandits of the Alberta Junior Hockey League (AJHL) in 2000.