Hammel exited after his right hamstring cramped while warming up for the third inning. Wood (3-0) pitched four perfect innings in his longest stint of the season.
Justin Grimm, Pedro Strop and Hector Rondon pitched one inning each for the Cubs, with Rondon getting his ninth save. He has converted 20 straight save opportunities dating back to Aug. 14.
Ben Zobrist extended his hitting streak to a career-high-tying 16 games. He singled leading off the fifth and reached third when right fielder Yasiel Puig misplayed the ball. He scored on Jason Heyward's infield single.
Dodgers starting pitcher Alex Wood (1-4) gave up two runs on seven hits in five innings.
