As far as custom picture framing goes, framing large items like this can be very tricky. It is a box frame with a mount but the best part is, if you see, it is float mounted. This gives more dept to the bat and gives the illusion it is floating within the frame.
Really this moulding suits this purpose perfectly and we use it mainly for framing objects, such as the second image there of the golf ball or a jersey frame. Having said that, practically any mould we have can be use to frame a large object like this.