Rapid Reaction: Red Sox 2, Yankees 1

NEW YORK -- Before rookie Mookie Betts makes his major league debut here Sunday night, the Red Sox might want to arrange for him to have a chat with Mike Napoli about the logistics of playing in Yankee Stadium.

If Betts is smart, he'll hang on every word.

The result: With two outs and two strikes in the ninth inning Saturday night, Napoli broke a 1-all tie with an opposite-field home run off Yankees ace Masahiro Tanaka to give the Red Sox a 2-1 win over the Bombers before a shocked-into-silence crowd of 48,433 in Yankee Stadium.

With one game left on this 10-game, three-city excursion, the Sox are 3-6 on this trip, 17-25 on the road, 14-20 in the AL East, and are now 3-6 against the Yankees. They trail the first-place Blue Jays by seven games in the East, and reach the season's midpoint at seven games under .500 (37-44).

The House That Nap Owns: The home run was the 10th of the season for Napoli, who joins Jonathan Schoop of the Orioles as the only players to take Tanaka deep twice this season. It was also his sixth home run at Yankee Stadium since he joined the Red Sox at the start of the 2013 season, the most by any visiting player in that time.

Lester shines: The home run made a winner of Jon Lester, who allowed just an unearned run on five hits, walking two and striking out six in eight innings. Two defensive plays, as they are wont to do in low-scoring games, figured prominently. Batterymate David Ross nailed Brett Gardner attempting to steal with a laser throw after he'd singled to open the sixth. The next two Yankees hit safely, but Lester struck out Carlos Beltran to end the inning.

The other play was highlight-reel stuff from Dustin Pedroia, who made a diving stop of Derek Jeter's smash with a runner aboard and no out in the eighth, then flipped the ball with his glove to Stephen Drew, who completed the double play.

Babe Ross: Boston scored three runs or fewer for the 12th time in the past 14 games, but both of its runs came on home runs. David Ross hit his fourth with one out in the third; the backup catcher has now homered in each of his past two starts.

Complete-game loser: In a rarity these days, Tanaka went the distance in the loss, allowing the Sox seven hits while walking one and striking out eight. Tanaka is now 11-3 and has lost back-to-back decisions for the first time this season.

Pedey percolates: Pedroia had three hits, leading off three different innings with line-drive base hits, one to right and two to center.