PROVIDENCE, R.I. — Junior Chris O’Dowd broke an eighth-inning tie with a three-run homer, helping Dartmouth to a 9-5 win to complete a sweep of host Brown on Sunday at Murray Stadium and a series victory by taking three of the four games this weekend. Coupled with the 12-1 blowout win in the opener, Dartmouth improved to 12-15 on the season and 7-5 in the Ivy League, opening up a three-game lead in the Rolfe Division over the Bears (7-24, 4-8 Ivy) and Harvard, which split a doubleheader with Yale today.

Tied at five in the eighth inning in the nightcap, freshman Matt Robinson drilled a double off reliever Heath Mayo (2-1), who was lifted in favor of Taylor Wright. Rookie Nick Lombardi greeted Wright with a single to left, putting runners on the corners, then O’Dowd crushed the first pitch he saw over the fence in right-center for his first homer of the season and an 8-5 lead. The Big Green tacked on another run when senior Jake Carlson tripled over the center fielder’s head and classmate Joe Sclafani singled him home.

Freshman Thomas Olson came on to pitch the eighth and ninth innings, keeping Brown off the board and preserving the win for sophomore Louis Concato (2-1), who tossed two innings of one-run ball.

Dartmouth scored first in the game, tallying an unearned run in the second when sophomore Jeff Keller singled with one out, took third on an errant pick-off throw and came home on a ground ball off the bat of Robinson. But the Bears battled back with three in the third off of Big Green junior left-hander Michael Johnson. Daniel Massey tied the game with an RBI single, then Wes Van Boom drove in two more with a two-out single with the bases loaded.

Brown added a run in the fourth thanks to a sacrifice fly off the bat of Matt DeRenzi, scoring Will Marcal who led off the inning with a triple. The 4-1 lead did not last long, however, as Sclafani ripped a two-run triple, the 19th of his career to establish a new Ivy League record, and scored when the throw got away, tying the game. Freshman Thomas Roulis then singled, went to second on a bunt, then third on a passed ball before sophomore Dustin Selzer drove a deep fly to right, allowing him to cross the plate.

Concato came on to pitch with the 5-4 lead in the sixth, but Marcal launched his first pitch for a game-tying homer, his fifth of the year.

O’Dowd and Carlson each went 3-for-4 to lead the 15-hit attack, while O’Dowd and Sclafani each drove in three runs.

In the first game of the day, the Big Green jumped on Brown starter Mark Gormley (1-3) in the first inning, thanks to the left-hander’s wildness. Dartmouth loaded the bases on two walks and a hit batter, then Selzer hit a fly to left that was dropped for a two-base error, allowing all three runners to score. Two outs later, O’Dowd pulled a double to left to score Selzer, and senior David Turnbull brought home O’Dowd with a single.

Gormley departed in the second after junior Ennis Coble singled home Sclafani, who walked to start the stanza. In the third, the Big Green touched up three relievers for four more runs for a 10-0 lead. The big hit of the inning came on a bases-loaded double by Roulis to score two runs, then Coble and Selzer each provided RBI singles.

The lone Bear run came in the bottom half of the third. DeRenzi drew a two-out walk, J.J. Franco singled him to second and Cody Slaughter brought him home with a single.

Dartmouth tacked on the final two runs of the game in the fourth, once again loading the bases on two walks and a hit batter. Both Sclafani and Roulis also walked, each forcing in a run.

Junior Kyle Hunter (1-3) pitched all seven innings for his first win of the season, allowing the one run on six hits and a walk while fanning four. The left-hander needed just 79 pitches to complete the game.

The Big Green lineup had just eight hits in scoring its 12 runs, but drew 10 walks and was hit three times. Roulis drove in three runs, O’Dowd scored three times, and Coble and Carlson each had two hits. Sclafani reached base all five times he stepped to the plate, going 0-for-0 with four walks and a hit by pitch.

Next up for Dartmouth is a Wednesday non-conference game at Hartford (8-25) at 3 p.m. Brown will host Holy Cross (21-16) in a doubleheader on Wednesday afternoon.