Why Scuff Balls Are Illegal

Here’s video of Mike Scott’s no hitter for the Astros to clinch the 1986 West division title. Scott threw 3 breaking balls the entire day. The rest were scuff balls. He would take a hole punch of sand paper, super glue it to his right ring finger and scratch one side of the ball as he had the ball in his hand. Watch how much dirty movement results from that little scuff.

http://mlb.mlb.com/video/play.jsp?content_id=3235120&topic_id=&c_id=mlb&tcid=vpp_copy_3235120&v=3

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