As you surely remember, Roger Clemens chucked the barrel of a broken bat at Mike Piazza during Game 2 of the 2000 World Series. He had hit Piazza in the head during the regular season and the drama carried over into the postseason. Clemens claimed he initally thought the bat was the ball, then threw it towards the dugout when he realized his mistake.

The barrel of that bat is now up for auction at Heritage Auctions. It includes a certificate of authenticity and everything. The listing is right here and as of this writing, the current bid is $4,000. Internet bidding ends on Feb. 22. Here's a photo of the bat shard, which clearly says "MIKE PIAZZA":

The bat was cosigned by Jeff Mangold, who worked as the Yankees strength and conditioning coach from 1998-2006. He took the bat home after the game and has kept for more than a decade.

"I've had this for 13 years," Mangold said to ESPN's Darren Rovell. "It was just sitting in my office and very few people knew about it. But I think this is an article of sports memorabilia that has some substance to it."

The Piazza-Clemens drama was probably the highlight of an otherwise uneventful World Series meeting between crosstown rivals.