DENVER (Interstat) — Shota Imanaga pitched five scoreless innings and Ian Happ homered in the ninth inning to tie the game, but the Colorado Rockies rallied for a 3-2 walk-off victory over the Chicago Cubs on Wednesday night at Coors Field.

The Cubs lost for the second straight night to the last-place Rockies, falling to 34-34 on the season. Colorado improved to 26-42.

Antonio Senzatela earned the win with a scoreless ninth inning, his sixth victory without a defeat this season. Daniel Palencia took the loss after allowing the game-winning single in the bottom of the ninth. Palencia faced three batters and gave up two hits and an earned run in zero innings.

Imanaga was dominant over five innings, allowing two hits and no runs while striking out seven. He walked one and faced only two batters over the minimum. Caleb Thielbar followed with 1 1/3 innings of hitless relief, striking out two. Jacob Webb pitched the eighth and allowed three hits and two earned runs with one strikeout.

Rockies starter Michael Lorenzen worked five innings, allowing one run on three hits with four strikeouts and three walks. Four relievers combined to hold the Cubs to one additional run over the final four innings.

The Cubs took a 1-0 lead in the fourth inning. Pete Crow-Armstrong led off with a triple to center field and scored on a groundout by Moisés Ballesteros. The score remained 1-0 until the eighth inning.

In the bottom of the eighth, Webb entered and allowed a leadoff single to Edouard Julien. TJ Rumfield followed with a two-run home run to right field, his eighth of the season, giving the Rockies a 2-1 lead. Ezequiel Tovar singled later in the inning but was left stranded.

The Cubs answered in the top of the ninth. Happ led off with a home run to right-center field, his 15th of the season, tying the game 2-2. Seiya Suzuki followed with a single, but Nico Hoerner grounded into a double play and Michael Conforto struck out to end the inning.

In the bottom of the ninth, Palencia entered and walked Troy Johnston to lead off. Brett Sullivan singled to right field, moving Johnston to third. Sterlin Thompson then singled to right field, driving in Johnston for the walk-off victory. The Rockies capped a three-run comeback after being held scoreless for seven innings.

Colorado outhit the Cubs 9-5. Happ finished 1-for-4 with the home run and one RBI. Crow-Armstrong went 1-for-4 with a triple and a run scored. Michael Busch was 1-for-4. Nico Hoerner doubled in the fifth inning. Alex Bregman walked twice but went 0-for-2. Conforto went 0-for-4 with three strikeouts. Seiya Suzuki struck out three times and was 1-for-4. Carson Kelly walked once in a pinch-hit appearance and went 0-for-1.

For the Rockies, Rumfield went 1-for-4 with the two-run homer and two RBIs. Tovar had two singles in four at-bats. Hunter Goodman had two singles and a walk in three plate appearances. Julien singled in his only at-bat. Sullivan and Thompson each singled in the ninth inning.

The game was played in 2 hours, 41 minutes before an announced crowd of 31,802.

The Cubs have now lost six of their last eight games, including a 7-3 defeat in the series opener on Tuesday. They fell below .500 for the first time since May 24. Colorado has won three of its last four after a nine-game losing streak.

The two teams conclude their four-game series Thursday afternoon in Denver. The Cubs then travel to San Francisco for a three-game weekend series against the Giants. The Rockies head to for three games against the Athletics before both teams meet again Monday in Chicago for a three-game series.

Interstat’s game simulator had projected a final score of Chicago Cubs 5, Colorado Rockies 4. Interstat’s ELO system had projected the Cubs with a 69.40 percent probability to win. The Cubs had been installed as a pregame favorite with a spread of minus 1.5. The total score of 5 went over the over/under line of 12.