Focus on Sport/Getty ImagesFernando gettin' ready ...Today is the 30th anniversary of Fernando Valenzuela's first start in the majors, the 2-0 Opening Day shutout that launched Fernandomania.But I'm going to take this occasion to focus on a different start, one that I think came to define Valenzuela as much as Fernandomania did, if not more: Game 3 of the 1981 World Series.At age 20, Valenzuela sizzled through the first eight starts of his career like no one we'd ever seen, but the story of his career was one of perseverance. In fact, even on Opening Day 1981, Valenzuela allowed baserunners in five of his first six innings, including runners on second and third with one out in the sixth inning of a 1-0 game.But nothing captured Valenzuela's endurance like his marathon i