A blow molded basketball goal having an inner post, an outer post, a rim, and a backboard. The inner post having a top end, a bottom end, a length measured from the top end to the bottom end, and a plurality of protrusions positioned near the bottom end. The outer post having a bottom end, a hollow interior defined by an interior wall, an open top end adapted to receive the inner post, and at least one protuberance on the interior wall. When the inner post is received in the outer post, the plurality of protrusions of the inner post bear against the interior wall of the outer post and the at least one protuberance of the outer post bears against the inner post. The rim is securable to the inner post, and the backboard is securable to the rim.