Brosch’s first experience in combat sports was kickboxing, in which he trained extensively during his teenage years. At the age of 20, Tebor began to train exclusively in boxing. He debuted as an amateur in September 2003 at the Summer Hayes Tournament in Brantford, Ontario, winning gold as a middleweight.
In October 2004, Brosch repeated his performance by again earning the Hayes tournament gold medal.
At the age of 23, Brosch made the decision to turn professional. He made his pro debut against Codey Hanna in Winnipeg, Manitoba on January 26, 2007.
Brosch dropped a unanimous decision to the 3-0 Hanna. The pair would later fight twice more, which resulted in draws for both bouts.
Tebor fought four times in 2008 at 155 lbs, drawing twice and dropping two decisions.
He competed in another four matches the following year, winning 3 fights (2 by stoppage) and drawing once at 145 lbs.