Eugenio Suarez hit a grand slam, Jordan Montgomery logged a quality start and the Arizona Diamondbacks beat the Colorado Rockies 11-4 on Wednesday in Phoenix to complete a three-game sweep.

Suarez also doubled twice and drove in five runs as Arizona won its season-best sixth straight game and improved to 18-3 since July 23. Lourdes Gurriel Jr. tallied two hits with two runs scored and Joc Pederson had two RBIs for the Diamondbacks while scoring twice.

Montgomery (8-6) notched a season-high eight strikeouts over six innings. The left-hander allowed three runs on five hits and three walks in his first quality start since June 21.

Colorado rookie Tanner Gordon (0-4) lasted just two-thirds of an inning in his sixth career start. The right-hander was tagged for four runs (three earned) on three hits, two walks and one hit batter. He threw 44 pitches and watched the Rockies commit two errors behind him in the first inning.

Michael Toglia had two hits and an RBI for last-place Colorado, which fell to 2-8 this season against its National League West rival.

Arizona sent 10 batters to the plate in the first inning and needed just three hits to take a 4-0 lead.

Corbin Carroll walked and Jake McCarthy singled to start the frame before both scored on Pederson's double down the first base line. Pederson also scored on the play after Toglia's wild throw from first to second base rolled to the left field wall.

A catcher's interference, a single and a hit by pitch later in the inning loaded the bases against Gordon, who was pulled after walking Geraldo Perdomo to make it 4-0. Peter Lambert relieved Gordon and escaped further damage.

The Diamondbacks went up 5-0 in the second when Josh Bell scored on Sam Hilliard's throwing error from right field following Gurriel's bloop single.

The Rockies scored three runs around a Suarez RBI double to pull within 6-3 in the sixth. Montgomery ended his day by fanning Hilliard with two on to escape the inning.

A pair of hit batters helped the Diamondbacks load the bases in the bottom of the sixth for Suarez, who blasted the first pitch out to left-center off Riley Pint for his 18th home run this season.

Carroll scored on Bell's bases-loaded double play in the seventh. Hilliard doubled home Hunter Goodman in the eighth.

--Field Level Media