For the first time, Tony Vitello got to live through the new extra-innings rule in Major League Baseball. The Giants and Washington Nationals made sure he got the full experience. After a wild hour, the Giants escaped with a 7-6 win in the 12th inning at Nationals Park. They’ve won three in a row and are back to even on the long road trip. The game went to extras after Ryan Walker coughed up a one-run lead in the bottom of the ninth. After the Giants failed to score their automatic runner in their half of the 10th, the Nationals loaded the bases with no outs in the bottom of the inning. Walker didn’t throw many pitches in the ninth, so he remained on the mound. He struck out Daylen Lile and then Nasim Nuñez, who swung through what would have been a game-ending ball four. Then, it got really weird. Jorbit Vivas hit a grounder to short and Willy Adames went for the force, but the runner coming from first beat him to the bag. With some quick thinking, Adames came through the second base bag and flipped the ball to first to end the inning. A stunned Vivas had somewhat shut it down, apparently thinking the inning was going to end with an out...