![Chicago Cubs fans wear their hats upside down as rally caps during game 3 of the NLDS at Wrigley Field in Chicago October 6, 2007. The Diamondbacks defeated the Cubs 5-1 to Chicago Cubs fans wear their hats upside down as rally caps during game 3 of the NLDS at Wrigley Field in Chicago October 6, 2007. The Diamondbacks defeated the Cubs 5-1 to](https://c8.alamy.com/comp/TXJ4JY/chicago-cubs-fans-wear-their-hats-upside-down-as-rally-caps-during-game-3-of-the-nlds-at-wrigley-field-in-chicago-october-6-2007-the-diamondbacks-defeated-the-cubs-5-1-to-sweep-the-series-3-0-upi-photomark-cowan-TXJ4JY.jpg)
Chicago Cubs fans wear their hats upside down as rally caps during game 3 of the NLDS at Wrigley Field in Chicago October 6, 2007. The Diamondbacks defeated the Cubs 5-1 to
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Ever wonder where, how baseball's 'rally cap' tradition got started? – NBC Sports Bay Area & California
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