Surprise! Manaea, A’s get no-hitter

Sean Manaea might’ve been the only person at the Oakland Coliseum who didn’t realize he was still working on a no-hitter. After a dropped popup in the fifth, the A’s lefty figured it was over. “I didn’t even think about it until I looked up in the seventh or eighth,” Manaea (3-2) said, “and I was like, ‘Oh my God, why is there still a zero on there?’”

Because it was ruled an error. And because his shot at history remained intact.

Manaea, 26, became the first pitcher to throw a no-hitter against Boston in almost exactly 25 years, with an overturned call on the bases preserving the gem Saturday night in Oakland’s 3-0 win over the Red Sox. Manaea struck out 10, walked two and threw 108 pitches to finish Oakland’s first no-no since Dallas Braden’s perfect game vs. Tampa Bay in 2010.

Boston looked as if it had a hit with two outs in the sixth at Oakland Coliseum. Andrew Benintendi hit a grounder to the right side, tried to dodge a tag by first baseman Matt Olson and was called safe.

Benintendi ran onto the grass in foul territory to get around Olson. The umpires then conferred and, without going to replay, ruled Benintendi was out for going wide of the baseline.

Sandy Leon reached in the Red Sox fifth when A’s shortstop Marcus Semien dropped a popup while trying to make an over-the-shoulder catch. It was scored as an error.

■ Giants first baseman Brandon Belt, with an epic 21-pitch at-bat in the top half of the first inning against Angels rookie Jaime Barria on Sunday, broke the league record for the most pitches seen in an at-bat.

The at-bat finally ended when Belt flew out to right fielder Kole Calhoun.

The old record of a 20-pitch at-bat was held by Ricky Gutierrez against Bartolo Colon on June 26, 1998.