SAN FRANCISCO -- The Giants’ starting rotation has performed as expected through the first four games of the season, but the club is still waiting for the lineup to start clicking.

Left-hander Alex Wood delivered a solid outing in his 2022 debut, but the Giants’ offense couldn’t capitalize on enough scoring opportunities in a 4-2 series-opening loss to the Padres on a blustery Monday night at Oracle Park.

• Box score

The Giants tallied 10 hits, but they went 0-for-11 with runners in scoring position and left 11 men on base. Mauricio Dubón opened the scoring with a sacrifice fly in the second, and Joc Pederson reached on a bunt single against the shift and came around to score on a wild pitch to tie the game, 2-2, in the sixth, but Tyler Rogers gave up the go-ahead run on an RBI groundout by Manny Machado in the seventh. (Rogers’ twin brother, Taylor, ended up picking up the save for the Padres.)

Darin Ruf nearly came through with the timely hit the Giants were searching for when he sent a drive deep to left field off Craig Stammen in the bottom of the seventh, but Jurickson Profar made a tumbling catch at the warning track to rob Ruf of a potential game-tying double and end the inning.

“I didn’t think there was any issues with the approach, I just don’t think we got the big hit,” manager Gabe Kapler said. “It’s something I think we’ve been struggling a little bit with early on this season. It’s something that came pretty naturally and easy to us last year. But it’s certainly not out of the ordinary for us to have a three- or four-game stretch where we have these little mini droughts where we aren’t scoring runs in bunches, and I think that’s where we are right now.”

Here are three takeaways as the Giants fell to 2-2 after their first four games of the year:

1. Wood’s velo bump

Wood came away with a no-decision after yielding two runs on five hits while walking one and striking out six over 4 1/3 innings. He was removed after surrendering a solo home run to Austin Nola that gave San Diego a 2-1 lead in the fifth. Wood, who re-signed with the Giants on a two-year, $25 million deal over the offseason, flashed an uptick in velocity on Monday night, topping out at 94.7 mph on his sinker after averaging 91.8 mph on the pitch in 2021.

“He did come out with quite a bit of extra velocity today,” Kapler said. “A lot of life on his ball. At the same time, I think he didn’t have his best command at times today.”

The Giants’ top four starters -- Logan Webb, Carlos Rodón, Anthony DeSclafani and Wood -- have combined to give up six runs over 19 innings (2.84 ERA) thus far, but they’ve been left to operate with little margin for error. San Francisco’s offense -- which is missing Evan Longoria, Tommy La Stella and LaMonte Wade Jr. -- is hitting .213 and has scored 12 runs over four games this year.

2. Yaz shows off with the glove

Mike Yastrzemski showed why he was a Gold Glove finalist in right field last year, making a pair of spectacular catches in foul territory on Monday night. Yastrzemski made a sliding catch on a popup off the bat of Wil Myers in the fourth and then made another grab against the protective net on Austin Nola’s fly ball in the seventh.

“I think he wants that Gold Glove this year,” Wood said.

Yastrzemski also snapped an 0-for-9 start to the season with a seventh-inning single, though Kapler noted that the 31-year-old slugger is still working to find his groove at the plate.

“The catches were spectacular,” Kapler said. “Good jumps. Obviously, like Yaz always does, he sacrifices his body in order to make a play for the team. I don’t think his timing is perfect right now. I think that when he’s on time and when he’s making an aggressive move to the baseball, when he’s at his most confident, you know it right away, the moment he steps in the batter’s box. He’s not there right now.”

3. Sign switches

Wood had to deal with another unexpected challenge on Monday, as he and catcher Joey Bart were having some technical difficulties with PitchCom, a wearable device that transmits signals from catcher to pitcher. Bart came out for a mound visit to sort out the issue and temporarily reverted to traditional finger signals before swapping out his wristband for a new one.

“It wasn’t bad, we just went back to doing what we always did,” Wood said. “It was just a little annoying when you start to get in a rhythm with using PitchCom. But I thought it was fine after that. We fixed it, and it was all good.”

Despite the hiccup, most of the Giants have given the new technology strong endorsements thus far, noting its potential to speed up the game and eliminate sign-stealing with runners on second base.

“This is definitely one of the most radical things that I think baseball has done in a long time,” veteran Curt Casali said. “But I think it’s been super positive so far.”