PITTSBURGH — The Pirates found five different ways to score in their 5-2 win against the San Francisco Giants on Thursday afternoon at PNC Park, and none of them included a base hit.

It took a bases-loaded walk, a hit by pitch, a throwing error, a fielder’s choice and a sacrifice fly, but they didn’t need any style points to clinch the series.

“We’ve talked a lot about the little details that matter and finding a way to keep the line moving,” Pirates manager Don Kelly said. “I thought today might have been our best day overall of manufacturing runs, finding a way to score in different ways.”

Righty Blade Tidwell (0-2, 4.43 ERA) took the loss for the Giants after walking five and giving up two hits and two runs across five innings. A combination of six Pirates relievers pieced together an impressive effort, allowing just two runs and limiting the Giants to two hits.

Khristian Curtis (1-0, 1.64) threw three-plus innings of two-run ball to earn his first win as a big leaguer. He was in Toledo, Ohio, with the Triple-A Indianapolis Indians late Wednesday night when he got the call for a promotion.

“Unbelievable,” Curtis said, “It’s a dream come true.”

He said he hit the road around 11:30 p.m. and arrived in Pittsburgh at roughly 3 a.m.

“I didn’t get much sleep,” said Curtis, who later added that he dozed for around four hours. “I was at the hotel pretty much all morning, just kind of waiting to find out if I was going to get active or not.”

In the first inning, Oneil Cruz drew a bases-loaded walk and Jake Mangum was plunked by a pitch in consecutive at-bats to give the Pirates an early 2-0 lead. They added on two more runs in the sixth thanks to a couple of Giants miscues.

First, with Cruz on second, Mangum hit a sacrifice bunt near the mound that led to a throwing error and a run. Then, with one out and runners on the corners, Jared Triolo chopped a tailor-made double play ball but beat out the throw to first.

“Mangum, I mean, he’s a spark plug,” Kelly said. “Just all the little things that he does in a lot of different ways that help you win, he’s been a real key contributor for us.”

Lake Bachar opened the bullpen game with 2 1/3 innings, issuing two walks and striking out three.

Making his third MLB appearance, Curtis saw his scoreless innings streak come to a close. He’d thrown 11 straight shutout frames — including three on Thursday — but lost his command a bit in the seventh.

Curtis walked two batters to lead off the inning before surrendering an RBI double to Jung Hoo Lee. Yohan Ramirez took over with no outs and runners on second and third and he limited the damage to an RBI groundout from Nate Furman.

Triolo gave the Pirates some added insurance with an eighth-inning sacrifice fly.

Mason Montgomery pitched his 16th straight scoreless appearance, putting the Giants down 1-2-3 in the ninth.

Montgomery earned his eighth save of the season — second on the team behind Gregory Soto’s 14 — and lowered his ERA to 2.97, the first time he’s dipped under 3.00 this season.

“It’s electric,” Bachar said. “It’s really fun to see him grow into the role. I think he’s still figuring out who he is and all that stuff out there, but it’s really fun to watch him.”

Brandon Eisert followed Bachar in the third, striking out Rafael Devers in a clean 2/3 of an inning before Curtis took the mound. The 24-year-old’s three walks were a career high, and he threw 46 pitches in the outing.

Curtis lost a bit of command and slipped, literally, a couple times on the mound — prompting Kelly and a trainer to check on him — but otherwise added a third promising performance to his young career.

He has a 4.90 ERA in 22 games in the minors this season, but he credits his early MLB success to trusting himself.

“Guys have a lot of different approaches [in the majors], and just being able to stick to my strengths and keep attacking and trusting all of my ability [has helped],” Curtis said. “Just go out there and compete, not really caring about who’s in the box.

“I know who I am and what I can do — just attack them.”

Luke Weaver bounced back from his struggles in Tuesday’s series opener and pitched a clean eighth before Montgomery slammed the door.

The Pirates’ five hits were tied for their fewest in the last nine games, and they hit 1 for 8 with runners in scoring position.

Cruz was especially productive without a hit, stealing a base and drawing a season-high-tying three walks.

— As part of two Thursday morning roster moves, the Pirates recalled Curtis and right-hander Wilber Dotel from Triple-A Indianapolis. Evan Sisk was optioned to Triple-A and 39-year-old Kirby Yates was placed on the 15-day injured list with right shoulder impingement as the corresponding transactions.

— The Pirates drew seven walks Thursday and 15 across the three-game series, including four with the bases loaded.

— Curtis is one of only four Pirates pitchers in the expansion era (since 1961) to begin their MLB careers with at least 11 straight scoreless innings. The others are Paul Maholm (2005), John Lamb (1970) and Jim Nelson (1970).

The Pirates continue their homestand at 6:45 p.m. Friday against the Los Angeles Angels. Jared Jones (2-6, 4.83) will start for the Pirates, and Ryan Johnson (3-7, 5.47) will open the series on the mound for the visitors.