[–] oddjob [OP] 1 points (+1|-0)

In the World Series, the Washington Nationals went to extraordinary lengths to prevent their signs from being stolen, with pitchers and catchers employing laminated cards, like quarterback wristbands, to signal in five sets of signs for each pitcher.

Explains why they lost every home game in the WS the 2nd time around. I bet the signs were feeding disinformation as well so a fastball could be slipped by.