INGLEWOOD, Calif.—Throughout his rehab from a broken ankle last season, Dak Prescott thought about what it would feel like to be on the field again and lead the Dallas Cowboys on a game-winning drive. Prescott directed the Cowboys on an 11-play, 49-yard march against the Los Angeles Chargers, culminating in Greg Zuerlein’s 56-yard field goal as time expired for a 20-17 victory on Sunday. “I mean, that’s what you do it for, for the ball in your hands for a chance to go win,” said Prescott, who completed 23 of 27 passes for 237 yards and an interception. “I was talking to the offense in the huddle that now we’ve got the game in a position that we wanted. We were able to capitalize, get into field goal range and let special teams go out there and do their job.” Dallas (1-1) overcame the loss of five players who started …