Cubs' Barrett slugs Pierzynski, leads to melee - ESPN
After barreling over fellow catcher Michael Barrett in a play he considered hard but clean, A.J. Pierzynski is surprised when the Cub backstop shows his displeasure by punching him in the face.
Michael Barrett (baseball) - Wikipedia
The Baseball Analysts: July 2007 Archives
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May 20, 2006: The Michael Barrett-A.J. Pierzynski fight
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A.J. Pierzynski barrels Michael Barrett then gets punched in the face, a breakdown, Good old baseball, By Jomboy Media
The Baseball Analysts: July 2007 Archives
Michael Barrett on the fight with A.J. Pierzynski - Marquee Sports Network
The Baseball Analysts: July 2007 Archives
MLB Michael Barrett vs AJ Pierzynski “Brawl at the Plate”
studies.htm
May 20, 2006: The Michael Barrett-A.J. Pierzynski fight
White Sox–Cubs rivalry