re: Proof that Mickey Mantle corked his bats

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According to the MythBusters August 8, 2007 baseball special, the ball hit by a corked bat travels at only half the speed of a ball hit by an unmodified bat, causing it to go a shorter distance. The cork inside the bat actually absorbs the kinetic energy like a sponge, hindering the batter's performance. In addition, because corked bats are lighter, they have less momentum to transfer to the ball, bringing them to the conclusion that the use of a corked bat had fewer benefits over a regular bat. The show also notes that while filling a bat with cork makes it lighter, there is nothing in the rule book that prevents a player from simply using a lighter, uncorked bat.[5] However, contrary to the last note in the episode, the reason players "cork" a bat is to keep it as long as a heavier bat, but make it lighter; which cannot be done without some kind of non-wood filler in the sweet spot of the bat.

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