OBA's athletic programs exist to support the school's overall mission by providing a Christ-centered competitive outlet that develops character, discipline, humility, respect for others and other life skills to become Christ-like leaders in life. OBA offers a variety of interscholastic activities for male and female students from 7th grade through 12th grade. OBA is a member of the Massachusetts Association of Christian Schools (MACS).

Fall Sports
-Girls' Volleyball
-Boys' Soccer

Winter Sports
-Girls' Basketball
-Boys' Basketball

Spring Sports
-Girls' Soccer