1988 Mark McGwire World Series game issued bat is a Rawlings Adirondack Big Stick with 1988 World Series labeling on the barrel, and Model 256B and initials MM stamped on the knob. Measuring 34.2" and weighing 33 ounces, there is evidence of bat rack paint transfers and this is a game model bat, we are unable to determine definite game use, thus this was likely available as a backup for Big Mac.