Grain Valley senior Mason McCain poses for a photo after breaking the school record in the 800 meters at Monday’s sectional meet in Mexico, Mo. McCain holds two individual school records and is a part of two relay school records as he heads into this weekend’s state meet. COURTESY OF ERIK STONE/ GRAIN VALLEY HIGH SCHOOL
By Bill Althaus The Examiner Mason McCain isn’t just a star when it comes to distance events, the Grain Valley High School senior has turned…