PHOENIX –– Max Muncy and Ildemaro Vargas both ran full speed to first base in the fifth inning of Thursday’s game between the Dodgers and Arizona Diamondbacks . In a brutal moment that knocked both players out of the game, neither got out of the way in time to avoid a head-on collision. With two outs in the fifth, Muncy had hit a ground ball up the line that Vargas, playing first for Arizona, fielded directly behind the bag. Vargas tried to race to the bag himself with the ball. Muncy was