LOS ANGELES — The baseball disappeared into the jet-black sky, only resurfacing as the lights of Dodger Stadium illuminated its descent. There have been days this month when Freddie Freeman looked like he could barely walk. After his final swing in a 6-3 victory over the New York Yankees in Game 1 of the World Series, he only had to trot. Freeman, the hobbled first baseman for the Los Angeles Dodgers, found a way to match Kirk Gibson in more than his gait. He swatted a 10th-inning walk-off grand slam on Friday night, a slight improvement on Gibson’s legendary walk-off in Game 1 of the 1988 World Series.