One more win? Try one more strike. That’s how close Mike Napoli was to being a champion. Leading 7-5 in the ninth inning of Game 6 of the 2011 World Series, the Texas Rangers were one strike from putting away the St. Louis Cardinals. But then, David Freese drove a 98-mph fastball over right fielder Nelson Cruz’ head for a game-tying triple. Texas blew another two-run lead in the 10th, lost in the 11th, then dropped Game 7, too. And so, Napoli remains ringless. The moral of the story: Don’t take anything for granted. Just because the Red Sox have two chances to win one game at Fenway Park and be crowned World Series champs for the third time in 10 seasons, and just because they have lost at home on consecutive days only once since mid-May, doesn’t mean it’s time to ease up in Game 6 tonight against the Cardinals. To a man, Red Sox players insist they understand the urgency of the moment. They say they won’t get ahead of themselves, at least not until they get ahead tonight. And even then, they won’t celebrate until closer Koji Uehara records the final out. Sure, the Sox can afford to lose Game 6, but if the Series reaches Game 7, all bets are off. And what the Cardinals are trying to do is hardly unprecedented. A team has come back to win Games 6 and 7 of a World Series on the road six times, most recently the Pittsburgh Pirates in 1979. “We’re definitely confident,” Game 6 starter John Lackey said before a brief workout last night at Fenway. “We played here pretty good this season, and the place, the atmosphere is going to be great. Fans are going to be crazy. But you’ve still got to focus on the task at hand and executing. We’re still one win away.”