Career
As an amateur boxer McCalmon represented Rawthorpe American Broadcasting Company. McCalmon had lost by split decision however McCalmon was awarded the boxer of the tournament for his display where he fought three fights in three days whereas Tischenko only fought one fight due to withdrawals. McCalmon turned pro at the age of 22. He made his professional debut on October 9, 2010 at the Leisure Centre in Huddersfield, where he fought against James Tucker.
Jason fought once more before the end of 2010 he fought on December 2, 2010 at the Cedar Court Hotel in Huddersfield against Jamie Ambler.
Jason cruised his way to a well-deserved 40-35 victory with Ambler losing a point in the third round for holding. His third fight was against the experienced Dean Walker on the Gary Sykes vs Carl Johanneson undercard.
Jason McCalmon battered Sheffield’s Dean Walker over four rounds, decking the experienced man twice on his way to a comfortable 40-34 victory. Dean Walker went down in the third round from a right to the temple and went down again in the fourth and final round.