BOSTON -- The Boston Red Sox and New York Yankees started Sunday night's game here in a cold rain that constantly evolved, from a downpour to a mist to a drizzle and back again. As each half-inning began and ended, Boston right fielder Mookie Betts hovered over his new best friend, the heater at the end of the Red Sox dugout, and went through an elaborate process of restoring and collecting heat.

Before each of his at-bats, Betts peeled off the left-hand glove he wore in the outfield and held it in front of the heater's blast, the way you'd dangle a marshmallow over a fire. Once Betts had that glove sufficiently roasted, he'd pull that on his left hand, then go through the same process with the batting gloves that he wore over the first layer of gloves.

Then, as the Red Sox finished their turn at bat, Betts would toast his mitt as well, before putting his bare hand in the pocket to draw the heat directly into his hand and then running onto the field.

This is a long way of explaining how unusual the conditions Sunday night were, and why it would probably be wise to not draw any conclusions from what happened in this game. Yankees starter Nathan Eovaldi seemingly had trouble gripping his splitter and his slider, and David Price -- who grew up about 30 minutes from Betts in middle Tennessee -- constantly made a fist with his left (throwing) hand before blowing temporary heat into it, but wasn't able to execute the cutter that had been so good against the Braves last week.

The Red Sox completed a sweep and the Yankees lost again, as they have been doing consistently for the past month, and while Alex Rodriguez had a good night with four RBIs and Jacoby Ellsbury sprayed hits, the overriding question for this team will linger beyond its off day today: Who will be the team's consistent source of offense?

The Red Sox have Betts, Xander Bogaerts and David Ortiz, and Dustin Pedroia (.324 average) and Travis Shaw (.322) are swinging the bat extremely well, too. The Tigers have Victor Martinez and Miguel Cabrera, the Dodgers have Adrian Gonzalez, the Rockies have Nolan Arenado, and of course Bryce Harper anchors the Nationals lineup.

With the Yankees, it's hard to know.