Abstract: An accessory tray assembly for a golf bag cart. The assembly includes a tray having two apertures formed therein with pivotally mounted container holders. A golf ball holder is included having two upstanding, resilient walls spaced apart the distance of a golf ball. Tapered ridges are formed along the inner surface of each wall to hold the golf balls therein. Golf balls are inserted in the holder by pushing the balls by the ridges which cause the walls to resiliently move apart to allow golf balls inserted or removed.End stops are included at the end of the walls to prevent the balls from rolling off the tray and having holes for holding golf tees. Snaps are formed around the perimeter of the tray for attaching straps to hold towels or other items.A female portion of a bayonet mount is formed on the lower surface of the tray. A clamp having the mating portion of the bayonet mount is attached to the golf bag cart by a rubber bushing.