The game belonged to the ninth inning. Colorado erased a one-run deficit and won it on Sterlin Thompson's walkoff single, beating Chicago 3-2 at Coors Field.
TJ Rumfield provided the equalizer with a two-run homer in the eighth inning, going 2-for-4 with 2 RBI. The blast gave Colorado a 2-1 lead after Chicago had controlled the game since the fourth. Rumfield is batting .274 with 9 home runs and 32 RBI this season.
Ian Happ tied the game in the ninth with a solo homer to right center, his 15th of the season. But Colorado answered immediately. Johnston scored on Thompson's single to right, giving the Rockies their second straight victory.
Shota Imanaga dominated through five scoreless innings, allowing 2 hits and striking out 7. Michael Lorenzen matched him with 5 innings of 1-run ball. Daniel Palencia took his first loss of the season, allowing 1 run without recording an out in the ninth. Antonio Senzatela earned the win with 1 inning of relief.
Colorado improved to 26-42 and extended their winning streak to two games. Chicago fell to 34-34, dropping their third straight. Senzatela is one win away from 50 career victories.