OAKLAND -- Mark Canha wasn’t happy. 

On a 1-2 count, José Suarez painted the outside corner with a fastball. Canha got rung up; he clearly didn’t agree. Canha flipped his bat to the ground in disgust and turned towards home-plate umpire Erich Bacchus to express his dismay. The disdain was ignored. 

Canha's frustration not only summarized the A's 4-2 loss to the Angels on Sunday at Oakland Coliseum, but the entire homestand. It was one in which offense, and particularly the team’s signature home run prowess, was scarce.

“Just quiet offensively,” said manager Bob Melvin. “It’s going to happen sometimes."

During the seven-game homestand, the A's only mustered 21 runs, averaging three per game. There were three contests in which they scored two runs or fewer, including a shutout on Saturday. But what was even more head-scratching was the lack of power.

The A’s, who entered the homestand with the second-most home runs in baseball, hit just two in the seven-game span, both of which came in the Mariners series. Oakland’s current drought of four consecutive games without a home run is its longest such stretch of the season.

It wasn’t just the home runs that were missing during this stretch; it was extra-base hits in general. When Jed Lowrie smacked a double in the first inning on Sunday, it was Oakland’s first such hit in 20 innings, dating back to Thursday night. Such a pronounced lack of pop runs counter to this team’s identity. 

“I think it’s just one of those stretches,” said right fielder Stephen Piscotty, who had one of Oakland’s four hits. “There were some balls hit hard that got caught. That’s kind of the way things go sometimes.”

Part of Oakland’s offensive woes can be attributed to the absence of center fielder Ramón Laureano, who has been sidelined the last three games with right groin tightness. Melvin said the team has yet to consider placing him on the injured list, the hope being that Laureano can return to the lineup on Tuesday in Seattle. Laureano won’t magically get Oakland out of its current slump, but getting him back in the lineup would provide some much-needed juice.

“Anytime your No. 3 hitter comes out, it affects you, but we just got Mitch [Moreland] back, too,” Melvin said. “Over the course of the season, you’re going to have injuries. Everybody has injuries. So, you gotta make do with it. Obviously, Ramón’s a big one for us, but like I said, we got Mitch back and we feel good with our lineup.”

The two runs that the A’s did plate in the series finale were hardly of their own doing. Angels shortstop David Fletcher began the third inning by committing a throwing error on a ground ball by Canha, followed by three consecutive walks from José Quintana -- gifting a run to Oakland. Catcher Sean Murphy then drove in another run with a sacrifice fly. 

Two runs -- unearned runs, at that -- on no hits.

Quintana may have been shaky, but the Angels’ typically turbulent bullpen was crisp. José Suarez pitched three scoreless innings in long relief. Steve Cishek, Mike Mayers and Raisel Iglesias combined to finish things off on the back end. At one point, the A’s went five consecutive innings without a hit.

“I don’t think we’re pressing or anything,” Piscotty said. “It’s a long season. Sometimes you go through these little lulls.”

Cole Irvin and the bullpen certainly did their part to keep the A’s in the game. The left-hander was tagged for four runs in the second inning and appeared destined for a quick pull, but found the composure to deliver six innings of work.

Jesús Luzardo, activated off the injured list prior to the game, provided some buzz late with a clean inning of relief in his first appearance since May 1, striking out one batter and touching 98.6 mph with his electrifying fastball.

Perhaps an escape from the Bay could help reinvigorate Oakland’s offense. As good as the pitching and defense were during this stretch of games at home, the A’s grip on the AL West division lead only stands to loosen if the bats stay quiet.

“Little change of scenery and we’ll have an off-day mixed in there, and then the off-day when we come back,” Piscotty said. “We’ve been grinding, there’s no doubt about it. And I don’t want to make excuses, but we’ve been playing quite a few games strung together. I think this road trip will help us catch our breath.”