SAN FRANCISCO (Interstat) — Nick Gonzales and Joey Bart each had four hits, Brandon Lowe drove in four runs and the Pittsburgh Pirates used a season-high 20 hits to crush the San Francisco Giants 13-3 on Saturday night at Oracle Park.

Every Pittsburgh starter recorded a hit. Oneil Cruz finished with three hits, Lowe and Ryan O’Hearn added two apiece, and Marcell Ozuna contributed a double. The Pirates improved to 22-18, while the Giants fell to 15-24 before a crowd of 40,417 in a game that lasted 3 hours, 4 minutes.

Pittsburgh left-hander Braxton Ashcraft earned his second win of the season, allowing just one earned run on six hits over seven innings with six strikeouts. Ashcraft improved to 2-2 after a dominant outing that followed a rough start against St. Louis on April 28, when he gave up six earned runs in 4 1/3 innings. In his previous start May 3 against Cincinnati, he fired 7 2/3 scoreless innings.

Giants right-hander Landen Roupp took the loss despite striking out eight over four innings. Roupp, who entered with a 5-2 record, allowed only one run on three hits but left after four innings with a pitch count at 84. The Giants bullpen could not contain the Pirates’ relentless attack.

The game was scoreless through four innings, with both starters trading zeroes. Ashcraft worked around a pair of first-inning singles by Luis Arraez and Heliot Ramos, inducing a double play from Rafael Devers to escape unscathed. Roupp navigated early trouble as well, stranding a walk and a double in the second inning.

The Pirates broke through in the fifth. Joey Bart led off with a single and moved to third on a base hit by Oneil Cruz. Brandon Lowe delivered a sacrifice fly to center, scoring Bart for the game’s first run. Bryan Reynolds followed with a single that brought home Cruz, making it 2-0. Roupp struck out Ryan O’Hearn but then allowed a single to Nick Gonzales before catching Gonzales stealing to end the inning.

San Francisco answered in the bottom of the fifth. Bryce Eldridge launched his first home run of the season, a solo shot to right field that cut the Pirates’ lead to 2-1. Ashcraft settled back in and retired the next three Giants batters, including a strikeout of Drew Gilbert.

Pittsburgh added two more runs in the sixth. Spencer Horwitz walked, moved to second on a single by Konnor Griffin, and scored when Griffin came home on a single by Joey Bart. Cruz then singled, putting runners at first and second, but Lowe struck out and Reynolds grounded out to end the inning with Pittsburgh ahead 4-1.

The game turned decisively in the seventh inning. Pittsburgh sent 11 batters to the plate and scored six runs, blowing the game open. Ryan O’Hearn led off with a sharp single, and Nick Gonzales followed with another single. After Marcell Ozuna struck out, Spencer Horwitz doubled to center, scoring O’Hearn and sending Gonzales to third. Konnor Griffin lifted a sacrifice fly to right, scoring Gonzales. Bart singled to left, driving in Horwitz and making it 7-1.

Oneil Cruz reached on an error by shortstop Willy Adames, putting Bart at second. Lowe then tripled to right field, clearing the bases with Bart and Cruz scoring, stretching the lead to 9-1. Reynolds walked, and O’Hearn greeted reliever Gregory Santos with a single that scored Lowe. Gonzales grounded out to end the inning, but the damage was done. Pittsburgh led 10-1.

Ashcraft worked a perfect seventh inning, retiring the Giants in order on groundouts and a flyout. He left after seven innings, having thrown 99 pitches, 57 for strikes. The Pirates bullpen took over in the eighth, with left-hander Evan Sisk striking out one in a clean inning.

Pittsburgh added three more runs in the ninth against Giants reliever Ryan Borucki. Bart singled to center and Cruz followed with a single of his own. Lowe doubled to left, scoring Bart and sending Cruz to third. Jared Triolo, pinch-hitting, singled to center, scoring Cruz and moving Lowe to third. O’Hearn grounded into a double play that allowed Lowe to score. Gonzales doubled to right but was stranded when Ozuna lined out to first base. The Pirates led 13-1.

San Francisco mounted a small rally in the bottom of the ninth against Pirates reliever Ryder Ryan. Heliot Ramos walked, and Logan Porter was hit by a pitch. After Eldridge lined out, Willy Adames flied out. Matt Chapman walked to load the bases, and Drew Gilbert also walked, forcing in Ramos to make it 13-2. Eric Haase singled to left, scoring Porter and cutting the deficit to 13-3. Jung Hoo Lee lined out to left to end the game.

The Pirates’ 20 hits were a season high, and every starter reached base at least once. Gonzales and Bart led the charge with four hits each. Lowe’s triple was his first of the season. Cruz added three singles, and O’Hearn had two hits and a walk. The Pirates also recorded two sacrifice flies, both in crucial run-scoring situations.

For the Giants, Eldridge’s home run was a bright spot in an otherwise difficult night. Heliot Ramos had two hits, and Luis Arraez added one. Manager Bob Melvin used five pitchers after Roupp’s exit, but none could slow the Pirates’ onslaught. Matt Gage pitched 0 2/3 scoreless innings, and Santos worked 1 1/3 innings without allowing an earned run, but the damage had been done.

The victory gave Pittsburgh a split of the first two games of the three-game series after a 5-2 loss Friday night. The Pirates have won five of their last seven games, while the Giants have lost 10 of their last 12.

Braxton Ashcraft’s performance was especially notable given his inconsistent recent outings. After a brilliant 7 2/3-inning shutout of the Reds on May 3, he struggled against the Cardinals on April 28, allowing six earned runs in 4 1/3 innings. Against the Giants, he pounded the strike zone effectively, inducing 11 groundouts and keeping the ball in the yard until Eldridge’s fifth-inning homer.

The game also marked a rare offensive explosion for the Pirates, who had scored two runs or fewer in three of their previous four games. Their previous season high for hits was 17 against the Reds on May 2.

Interstat’s game simulator had projected a final score of Pittsburgh 5, San Francisco 2. Interstat’s ELO system gave San Francisco a 53.00 percent probability to win. Pittsburgh had been installed as a pregame favorite with a spread of minus-1.5. The total combined score of 16 went under the over/under line of 7.