PHOENIX (Interstat) — The Washington Nationals unloaded a season-best offensive explosion Friday night, routing the Arizona Diamondbacks 14-1 at Chase Field behind a barrage of home runs and a dominant start from left-hander Foster Griffin.

Washington snapped a three-game losing streak in emphatic fashion, scoring in six of nine innings and amassing 16 hits. The Nationals improved to 32-32, while Arizona fell to 33-30.

The decisive blow came in the sixth inning, when Luis García Jr. crushed a grand slam to center field, his seventh home run of the season. The blast erased any doubt about the outcome, turning a 7-1 lead into an 11-1 advantage. García’s slam capped a five-run inning that also included a solo home run by CJ Abrams, his 13th, on a line drive to right center.

Washington had already built a comfortable cushion with a two-run first inning and a four-run third. James Wood walked to lead off the game, and García followed with a two-run homer to right field, giving the Nationals a quick 2-0 lead. Wood struck again in the third, leading off with a solo homer to center, his 17th of the year. The Nationals added three more runs in the inning on an RBI single by Daylen Lile and a two-run double by Jorbit Vivas, extending the lead to 6-0.

Arizona answered in the bottom of the third when catcher Aramis Garcia hit his first home run of the season, a solo shot to left center, cutting the deficit to 6-1. But that was all the Diamondbacks could muster against Griffin, who scattered six hits over six innings, striking out six and walking none.

Daylen Lile added a solo homer in the fifth, his eighth, pushing the lead to 7-1 before the Nationals broke the game open in the sixth. Drew Millas singled, Nasim Nuñez singled, and James Wood singled to load the bases with no outs. García then deposited a 1-0 pitch over the center-field wall, clearing the bases. Abrams followed two batters later with his homer, and the Nationals cruised from there.

Washington tacked on a run in the eighth when Dylan Crews was hit by a pitch with the bases loaded, scoring Curtis Mead. In the ninth, Jorbit Vivas singled home Mead for the final margin. The Nationals finished with 16 hits, five of them for extra bases. García led the way with two home runs and six RBIs. James Wood reached base five times with two hits, two walks and a hit by pitch, scoring three runs. Abrams had three hits and two walks, scoring three times.

Merrill Kelly took the loss for Arizona, allowing seven earned runs on six hits over five innings, striking out four and walking two. The Diamondbacks managed only six hits, with Geraldo Perdomo and Tommy Troy recording two each. Arizona used five pitchers, including position player Adrian Del Castillo, who pitched 1 2/3 innings of relief, allowing one earned run on four hits.

Griffin earned his seventh win against two losses, lowering his ERA with another efficient outing. He retired the side in order three times and never allowed a runner past second base after the third inning. The Nationals defense turned two double plays behind him.

The game was completed in 2 hours, 39 minutes before an announced crowd of 24,272.

Coming into the series, Washington had lost three straight at home to the Miami Marlins, scoring just seven runs in those games. The offense found its rhythm immediately against Arizona, which had won three of its last four contests, including a 3-2 victory over the Los Angeles Dodgers on Thursday.

The Nationals now have a chance to win the series when the teams meet Saturday and Sunday at Chase Field, then travel to San Francisco for a three-game set starting Monday. Arizona will host Washington again Saturday and Sunday before beginning a six-game road trip to Miami and Cincinnati.

Interstat’s game simulator had projected a final score of Arizona Diamondbacks 6, Washington Nationals 4. Interstat’s ELO system gave Arizona a 62.00 percent probability to win. Arizona had been installed as a pregame favorite with a spread of minus 1.5. The total combined score of 15 went under the over-under line of 8.5.