While there , he batted . 252 in the 1967 season , hitting 4 home runs in 155 at - bats .
As an 18 - year - old , Mayberry was assigned to the Covington Astros of the Appalachian League .
While there , Mayberry batted . 252 in the 1967 season , hitting 4 home runs in 155 at - bats .
As an 18 - year - old , Mayberry was assigned to the Covington Astros of the Appalachian League .