SAN FRANCISCO — Things seemed to be lined up for the Cubs Tuesday evening, coming off a three-game sweep in Anaheim and with the Giants 2-13 at home since the All-Star break.

But this one didn’t feel right almost from the beginning. It didn’t feel right when the Cubs stranded two runners in the first, and again in the third. It didn’t really even feel right when the Cubs took a lead in the middle innings.

And those feelings turned out to be correct, as Matthew Boyd allowed a pair of home runs for only the second time all season and the Cubs offense vanished after the fifth. All that led to a 5-2 loss to the Giants, not the way the Cubs would have liked to begin this series.

Seiya Suzuki and Pete Crow-Armstrong singled with two out in the first. Suzuki took third on PCA’s single and then

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