Tie the rolling pin and the baseball bat together with rubber bands, then roll the pin and the baseball bat on the floor or the table top.
First catch the bat, then place the bat on a wooden cutting board. Make sure the bat does not fly away. To keep the bat on the wooden cutting board, get a big nail and hammer and afix the live bat on the cutting board. Also make sure it is not a vampire bat. Then roll the rolling pin over the bat.