A backstop for placement around a goal to stop sport projectiles from traveling beyond the outer edge of the goal, the backstop includes a material implement having a goal acceptance aperture located substantially central to the bottom edge and extending towards the top edge. The backstop includes an attachment mechanism that secures the material implement to the goal. The backstop further includes at least one bracket that is operable to attach to the goal frame. A support structure extends from the at least one bracket and is operable to support the material implement to extend beyond the outer edge of the goal.