Orioles 9, Red Sox 7

BOSTON — Chris Davis blasted a three-run home run with two outs in the top of the ninth inning and drove in five runs as the Baltimore Orioles spoiled the Fenway Park debuts of David Price and Craig Kimbrel with a 9-7 win over the Boston Red Sox on Monday afternoon.

Davis unloaded on an 0-1 knuckle-curve from Kimbrel and deposited it into the center-field bleachers after Caleb Joseph and Manny Machado walked to snap the 6-6 tie.

Mookie Betts brought the Red Sox within two on his solo home run to lead off the bottom of the ninth, and Dustin Pedroia singled and Xander Bogaerts walked to set up David Ortiz.

Ortiz grounded into a double play and Hanley Ramirez struck out to end the game.

Mark Trumbo also clubbed a three-run homer and Jonathan Schoop added an RBI for Baltimore (6-0), which remained the only undefeated team in the majors.

Yovani Gallardo gave up five runs on seven hits and a walk while striking out three in a five-inning no-decision for the Orioles.

Brad Brach (2-0) earned the victory and Zach Britton picked up his third save.

Betts and Jackie Bradley Jr. each drove in two runs while Ortiz, Ramirez and Bogaerts all had one RBI for Boston (3-3).

Price was up and down in his Fenway debut with the Red Sox, striking out eight but allowing five runs — all in the fifth — on five hits and two walks over five innings.

Kimbrel (0-1) took the loss after serving up the Davis homer and had two strikeouts.

Back-to-back doubles helped Baltimore break a 5-all tie on Schoop's two-bagger in the sixth, but Bradley beat out a throw at first to plate Holt in the bottom of the frame to make it 6-6.

Bogaerts kicked off Boston's three-run first inning with an RBI-single up the middle.

Ortiz, who was given a standing ovation before his first at-bat, showed his appreciation with an RBI-single off the Green Monster in left, and Ramirez's ensuing sacrifice fly made it 3-0.

Davis avenged a first-inning strikeout — Price's first with Boston at Fenway Park — with a two-run single with the bases loaded and nobody out in the fifth.

Trumbo's three-run blast to center one at-bat later gave Baltimore the lead at 5-3.

Bradley's ground rule double into the stands in left let Holt score in the fourth and Betts brought him home on a fielder's choice as the Red Sox knotted the score at 5-5.

NOTES: Red Sox DH David Ortiz, who said he plans to retire following this season, was accompanied by Boston sports icons Bill Russell, Bobby Orr, and Ty Law to throw out the ceremonial first pitches. Ortiz's daughter, Alex, sang the national anthem. … Boston's John Farrell managed his first game at Fenway Park since being diagnosed with stage one Non-Hodgkin's Burkitt lymphoma on Aug. 14, 2015. On Oct. 22, Farrell said his cancer was in remission. … Orioles CF Adam Jones (rib injury) missed his fourth consecutive game to start the season. Jones ran and played catch before the game. … Baltimore won its first five games to enter Monday as MLB's only remaining undefeated team, matching its best start since 1970.