DENVER -- The Rockies and Red Sox went deep into extra innings, generating enough drama for a full series before the Rockies finally capped the night with a walk-off single from Ezequiel Tovar to take the first game of the three-game set, 9-8, at Coors Field Monday.

Jake Cave sparked the winning rally with an RBI single and advanced to second when the ball got past Tyler O’Neill for an error. After an intentional walk to Jacob Stallings, Sam Hilliard put down a bunt to move the runners to second and third. The Red Sox intentionally walked Aaron Schunk to bring Charlie Blackmon to the plate, who struck out before Tovar lifted a line drive to center to end it.

The Red Sox got their first lead of the game in the 1oth inning, when pinch-hitter Dominic Smith opened the inning with an RBI double to right-center field. Connor Wong took Brenton Doyle to the warning track, where he leaped to make the catch, robbing Wong of what may have been a homer. Rafael Devers followed with a liner to left, deep enough to score Smith, who had advanced on Wong’s fly.

The Rockies caught a break in their half of the 10th when reliever Zach Kelly balked, advancing the automatic runner, Jake Cave, to third, before Hilliard launched a Statcast-projected 450-foot homer into the Rockies’ bullpen to tie the game.