PHOENIX (AP) — The San Francisco Giants lost their third consecutive game when Mark Trumbo hit a grand slam to lead the Arizona Diamondbacks to a 6-2 victory Monday night.

Trumbo had five RBIs, and Wade Miley (8-11) bounced back from his shortest outing of the season by pitching seven innings of one-run ball.

San Francisco’s NL West chances took a hit with consecutive losses to the Dodgers over the weekend, but the Giants are still in control of the wild-card race, beginning the day with a three-game lead over Pittsburgh for the top spot.

What the Giants couldn’t afford was a letdown in a three-game series at Chase Field, where they had won 16 of 22 games and six straight series since 2012.

The start of this series didn’t go so well.

Trumbo hit his ninth homer off Ryan Vogelsong (8-11) in the third inning and a run-scoring single off Juan Gutierrez in the seventh. Trumbo has six hits and nine RBIs the past three games.

Joaquin Arias had three hits and Buster Posey a run-scoring single for the Giants, who dropped four games behind the Los Angeles Dodgers in the NL West.

Vogelsong pitched 6 2-3 scoreless innings against the Diamondbacks his last outing, but was in trouble by the third in his 30th start of the season. The Diamondbacks loaded the bases against him and Trumbo cashed in, ending a 120 at-bat homerless streak by lifting his second career grand slam just over the wall in right.

Arizona loaded the bases again in the sixth against Vogelsong, but Javier Lopez ended the threat by inducing a groundout on his first pitch.

Vogelsong allowed four runs and six hits with four walks and five strikeouts.

Miley had his shortest outing of the season his last start against the Giants, lasting just two innings after giving up three runs and five hits.

The left-hander was better in his 100th career start, escaping a jam in the second inning and giving up one run on Brandon Crawford’s groundout in the seventh. Miley struck out four.

TRAINER’S ROOM

Giants: 1B Brandon Belt was activated before the game after clearing concussion protocols. He had been on the DL since Aug. 8.

Diamondbacks: OF David Peralta (back) has resumed all baseball activities and could join Arizona for its final road trip.

UP NEXT

Giants: RHP Jake Peavy, Tuesday’s starter against Arizona, has allowed two earned runs or less in six straight starts. He pitched 5 2-3 innings of one-run ball in a 6-2 victory over Arizona on Thursday.

Diamondbacks: RHP Josh Collmenter is 2-0 with a 0.65 ERA over his last four starts, leaving him one win shy of matching his career high of 10.