Abstract: A baseball base is disclosed having an anchor which is adapted to be permanently fixed in the ground, and a bag of a resilient material which snaps on to the anchor when in use. The anchor has a platform and a bag engaging portion with outwardly flaring walls which project upwardly from the platform. The bag has internal wall surfaces which define a recess in the undersurface of the bag. These wall surfaces are flared to accommodate the mounting and dismounting of the bag to the anchor portion. Ribs project into the recess from the undersurface of the bag and limit the depth of insertion of the anchor into the recess. These ribs also reinforce the bag and trap pockets of cushioning air between the anchor and bag. In addition, the bottom of the bag engages the anchor platform when the bag is in place to aid in supporting the bag. Also, a shelf portion of the bag, which surrounds the interior perimeter of the recess, engages the anchor and provides further support for the bag.