The Cubs' victory came after an ugly 6-1 loss to the Rockies in Friday's series opener, when the North Siders made four errors and put up their lowest run total of the season. Saturday, the Rockies threatened in the third inning when Dustin Garneau led off with a double and reached third with one out. But Arrieta escaped that inning by striking out Trevor Story swinging, and the Rockies only got one runner in scoring position against him for the rest of the game.
Carlos Gonzalez, who extended his career-best hit streak to 21 games on a fourth-inning single, homered with a man on in the ninth off Travis Wood for the Rockies' only runs.