Heading into the World Series against the Houston Astros, the Washington Nationals took extra precautions to protect themselves against possible sign-stealing.
Barry Svrluga of the Washington Post broke down the many layers Nationals' pitchers and catchers went through during the Fall Classic:
"First, each pitcher had to have his own set of signs, and catchers Yan Gomes and Kurt Suzuki had to be familiar with each one. So the staff printed out cards with the codes and had them laminated. The catchers could have them in their wristbands, a la an NFL quarterback with play calls strapped to his forearm, and the pitchers would have them in their caps.