BOSTON — Rafael Devers grounded a single up the middle to drive in the winning run with one out in the bottom of the 10th inning Saturday, lifting the Boston Red Sox past the Baltimore Orioles 6-5 in the opener of a split doubleheader.

Jarren Duran, Wilyer Abreu and Abraham Toro hit solo home runs for Boston, which wore its “Fenway Green” alternate uniforms that debuted this month and match the color of the Green Monster.

Toro also homered in Game 2, but Ryan O’Hearn hit a tiebreaking RBI single in the eighth inning, Dylan Carlson doubled home an insurance run in the ninth, and the Orioles earned a split with a 2-1 victory.

Devers entered the day batting .419 with 28 RBI in 20 games in May, and led the majors with 47 RBI overall.

Ramón Urías had a first-inning, two-run double in Game 1 for Baltimore, which moved ahead 5-2 with a three-run fifth.

Toro’s drive into the Orioles’ bullpen — the third homer allowed by starter Zach Eflin, who gave up a career worst-tying eight runs and four homers in his last start — cut it to 5-3. Boston tied it with two runs in the sixth; the first coming on shortstop Gunner Henderson’s throwing error and the other on Nick Sogard’s groundout.

Greg Weissert (2-1) worked a hitless top of the 10th.

A day after scoring 19 runs in a blowout victory — including 13 in the eighth inning — the Red Sox got first-inning solo shots from Duran and Abreu.

The game was the makeup of Friday night’s rainout and started after a 26-minute rain delay.

Red Sox starter Lucas Giolito and Baltimore’s Trevor Rogers matched scoreless innings in the nightcap before turning things over to the bullpens. Giolito struck out six and allowed six hits and two walks over seven innings. Rogers held the Red Sox to two hits through 6 1/3 innings.

Baltimore’s win was just its second in the last 12 games.