BOSTON — Few opponents seem to have the Boston Red Sox figured out these days, but Athletics rookie left-hander Gage Jump is one of them.

The Red Sox entered Saturday afternoon’s game on a nine-game win streak, and with 11 wins in their last 12.

Their only loss in that span came on July 28 in Sacramento, when Jump blanked them for six innings in an eventual 4-3 A’s win.

It was a similar story Saturday at Fenway Park, where the A’s overcame an early deficit and defeated the Red Sox, 7-3.

Boston batters initially fared better in their second game against the A’s starter. Jump gave up a leadoff single and stolen base to designated hitter Jahmai Jones and walked third baseman Caleb Durbin. A two-run single by Andruw Monasterio gave the Red Sox a 2-0 lead in the bottom of the first.

But then Jump settled in and put together a career day, hitting double-digit strikeouts for the first time as a big leaguer. He worked around threat after threat, including speedy Jarren Duran, who reached safely with one out in the second thanks to an error by the pitcher. The Red Sox stranded at least one batter in each of the first six frames.

Red Sox rookie Jake Bennett retired his first eight batters and took a no-hitter into the fourth before shortstop Jacob Wilson led off what would be his first of two doubles in two innings.

Bennett managed to hold the A’s to one run in a three-hit fourth, but they were back with a vengeance in the fifth, sixth and seventh, scoring at least one run per inning. He exited after 5 1/3 innings, charged with four earned runs on five hits, with three walks and five strikeouts on 88 pitches (59 for strikes).

Jump and the A’s bullpen combined for eight scoreless innings after the two-run first. The A’s starter finished with two earned runs on six hits, two walks, and a career-high 11 strikeouts, on exactly 100 pitches (69 for strikes).

There were signs of life from the Boston bats at last in the bottom of the eighth, but they were quickly quashed. Eli White drew a two-out walk off righty Seth Johnson, and raced home to score on a long ball by Nick Sogard that bounced past right-fielder Lawrence Butler.

The A’s challenged the run on the basis of the ball leaving the field of play, and were successful. Sogard’s hit was a ground-rule double. White was forced to return to third base, where he watched Duran strike out and slam his bat into the dirt.

The lopsidedness of the game was emphasized moments later when center fielder Henry Bolte sent Burgos’ first pitch of the ninth 439 feet to dead-center to push the A’s lead to five.

Boston did not go quietly into the ninth, though. Durbin, the hero of Thursday’s 13th-inning walk-off win over the Chicago White Sox, came through in the ninth. Jones doubled with one out in the bottom of the ninth, and scored on Durbin’s two-out RBI single.

Willson Contreras followed with a single, and Monasterio walked to load the bases. White came to the plate representing the tying run. He took a strike and three balls as a bolt of lightning flashed in the distance beyond the Green Monster, but the high-drama inning came to an end when he lined out to Bolte in center.

The Red Sox struck out 15 times, and turned 10 hits and four walks into 2 for 14 with runners in scoring position and 12 men left on base. It’s the most lifeless they’ve looked at the plate in weeks.

At least they don’t have to face Jump again this year.

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