The details don’t matter, except to Anthony Rizzo and Willson Contreras. One gives a sign, the other sees it. “I don’t know what it is,” said manager Joe Maddon. “I don’t want to know.” What matters is that with the Cubs leading the Nationals 3-2 in the the eighth inning Friday but runners at first and second with nobody out, Contreras fired to first after receiving a ball from Carl Edwards Jr. Rizzo put a glove on Juan Soto, the Nationals’ rookie right-fielder. And that out helped Edwards bail out Brandon Kintzler, who had walked both runners. “It’s a do-or-die play,” Rizzo said. “If I go too early, (Soto is) gonna know. Willson made a great throw. If that ball gets by me, I’m the goat out there.”