BALTIMORE (Interstat) — Andruw Monasterio hit a grand slam and drove in four runs, Willson Contreras homered and drove in five, and the Boston Red Sox erupted for 10 runs in the ninth inning Saturday to rout the Baltimore Orioles 17-1 at Oriole Park at Camden Yards.

The Red Sox, who entered the game with a 9-17 record, snapped a four-game losing streak in emphatic fashion, pounding out 17 hits and taking advantage of porous Orioles pitching. Boston starter Garrett Crochet worked six innings, allowing three hits and no earned runs while striking out seven to improve to 3-3.

Baltimore took a 10-3 loss to Boston on Friday, but the rematch was never close. The Orioles managed only six hits and scored their lone run in the seventh inning, when Tyler O’Neill singled, advanced to third on a throwing error by third baseman Caleb Durbin and scored on a groundout by Leody Taveras.

Boston struck first with a three-run second inning. After Trevor Story struck out, Monasterio doubled, then Caleb Durbin doubled him home. Connor Wong walked, Isiah Kiner-Falefa singled in Durbin, and Ceddanne Rafaela singled in Wong, chasing Baltimore starter Trevor Rogers. Rogers allowed three runs on three hits over 1 1/3 innings and took the loss, falling to 2-3.

The Red Sox added a run in the fourth on a sacrifice fly by Contreras, then pushed three more across in the fifth. Story reached on a fielder’s choice, and after a walk and a forceout, Connor Wong cleared the bases with a double to right, scoring Story, Monasterio and Durbin.

Baltimore’s relief corps kept the game within reach until the ninth, when Boston sent 14 batters to the plate and scored 10 runs. Rafaela led off with a triple, Contreras singled him home, and after singles by Wilyer Abreu and Story, Monasterio launched a grand slam to center field, his first home run of the season. Jarren Duran followed with a single, and Durbin hit his first homer, a two-run shot to left, making it 14-1. Then Contreras capped the inning with a three-run homer to center.

Crochet allowed two walks, induced a double play in the sixth and kept Orioles hitters off balance throughout. Tyler Samaniego, Danny Coulombe and others combined to finish the game without further damage.

Monasterio, who had been 0 for 8 in his previous two games and 1 for 12 over his last four, went 3 for 6 Saturday with the grand slam and a pair of doubles. Contreras finished 2 for 4 with a homer and five RBIs. Durbin was 2 for 4 with a homer and three RBIs. Rafaela went 3 for 5 with an RBI and three runs scored.

Baltimore’s Albert Suárez threw four innings of two-hit, shutout relief, striking out two, and Tyler Wells added 1 1/3 scoreless innings. But the Red Sox’s nine-run outburst in the final frame turned a manageable deficit into a laugher.

The most critical sequence of the game came in the second inning, when Boston broke a scoreless tie with three two-out runs. After two quick outs, Monasterio doubled, Durbin doubled him home and the Red Sox strung together three consecutive hits and a walk to take a lead they never surrendered. That inning set the tone for an afternoon that would see Boston outhit the Orioles 17-6 and win by 16 runs.

Boston moved to 10-17 with the victory, while Baltimore fell to 13-14. The two teams complete the series Sunday at Camden Yards before Boston travels to Toronto for a three-game set and Baltimore hosts Houston for three games.

Interstat’s game simulator had projected a final score of Baltimore 4, Boston 3. Interstat’s ELO system had projected Boston with a 50.40 percent probability to win. Boston was installed as a pregame favorite with a spread of minus 1.5. The total score of 18 went under the over-under line of 8.