SAN FRANCISCO -- The Giants’ offense may not be fully clicking yet, but their starting rotation sure seems to be.

Right-hander Anthony DeSclafani became the latest starter to turn in an impressive performance for San Francisco, striking out eight over six shutout innings to help the Giants blank the Rockies, 4-0, and complete a three-game sweep on Sunday afternoon at Oracle Park.

• Box score

Alex Dickerson and Brandon Belt homered, and LaMonte Wade Jr. went 2-for-3 in his Giants debut to back DeSclafani, who earned his first win of the season in the club’s first shutout victory since September 13, 2019.

“Everyone’s been throwing the ball really well,” DeSclafani said. “I think it’s good to get off to a good start. We’re going to keep the ball rolling here and just continue to go out and try to make pitches and give our team a good chance to win the ballgame.”

At 6-3, the Giants are off to their best start since 2016, an impressive feat considering they entered Sunday batting .197, the fourth-lowest mark in the Majors. The starting rotation, which was a bit of a question mark heading into the season, has carried the club thus far, logging a stellar 2.32 ERA through the first three series this year.

Giants starters have now thrown at least five innings and given up no more than three runs in each of the club’s first nine games. Only twice in the modern era have the Giants had a longer streak to begin a season: 1937 (10) and 2002 (12).

“I think anybody who’s watching has noticed that our offense has not been where it’s going to be or where it could be right now, and we’re still managing to win baseball games,” Belt said. “I think that’s just a testament to how great the pitching staff has been so far.”

While he’s nicknamed “Disco,” DeSclafani turned to a different genre of music to help set the tone for his strong outing on Sunday. The Giants were playing Frank Sinatra in the bullpen when DeSclafani was warming up before the game, creating a soothing vibe for the New Jersey native.

“I listened to a lot of Sinatra when I was in High A ball before a game,” DeSclafani said. “A lot of guys like listening to pump-up music and fast-paced music. Even back then, I always liked listening to something that was more calming just to kind of go into a game a little more calm instead of being jacked up.”

DeSclafani said his favorite Sinatra tune is “My Way” -- a fitting answer considering he was able to impose his will against Rockies hitters on Sunday.

DeSclafani issued only one walk and scattered six hits in the 94-pitch effort, coming up with a few big strikeouts to keep Colorado off the board. The biggest threat he faced came in the sixth, when Trevor Story led off the inning with a double that went over the head of Wade in right-center field.

Charlie Blackmon followed with an infield single to put a pair of runners on base for Colorado, but DeSclafani worked out of the jam by inducing a flyout from Ryan McMahon and capping his outing with back-to-back strikeouts of Josh Fuentes and Sam Hilliard.

Fuentes remained on one knee and slammed his bat on the ground after swinging through a nasty curveball, and Hilliard couldn’t catch up to a 94 mph sinker from DeSclafani, who pumped his fist as he walked off the mound after recording his final two outs of the afternoon. DeSclafani, 30, has allowed only one run over 11 innings in his first two starts with the Giants, who signed him to a one-year, $6 million deal over the offseason.

“He was really dominant through periods and was able to reach back for everything he needed in many situations,” manager Gabe Kapler said. “I thought he did a nice job executing his slider and his changeup. He mixed in his curveball. He and [catcher Curt] Casali were seemingly on the same page throughout the outing. He really looked like a confident dude coming out of the bullpen.”

While the Giants’ offense isn’t firing on all cylinders, the lineup did show a fundamentally sound approach against Rockies ace Germán Márquez, who was forced to throw 36 pitches in the first inning.

Dickerson opened the scoring by crushing his second home run of the year, a 413-foot solo shot over the right-center-field wall in Triples Alley. Belt kept the two-out rally alive by drawing a walk and then alertly stole second base when he realized he wasn’t being held by the Rockies’ defense.

“That was really the most unbelievable thing I’ve ever seen in my entire life,” Belt deadpanned. “Some people call it stupidity. I like to call it instincts.”

Belt’s baserunning proved timely, as he went on to score from second on a single by Evan Longoria to extend the Giants’ lead to 2-0. Belt also flashed his power in the sixth, when he drove a misplaced slider from Márquez over the arcade in right field to make it 3-0. His first home run of the year left his bat at 108.7 mph, his third-hardest hit ball since Statcast’s inception in 2015.

“I’ve been working a lot with the hitting coaches in the cage, trying to get that feeling back that I had last year,” said Belt, who entered Sunday hitting .125. “I haven’t had too many at-bats yet, but I knew I was getting close. Today I felt good when I went out there.”