By the time greasy food wrappers danced in the Opening Day wind and the chilly rain arrived, the Yankees had smothered an almost empty Yankee Stadium with a Port-A-John stench. Beginning with CC Sabathia, moving to the “Dead Bat Society’’ and ending with a pitiful bullpen performance, the Yankees dropped an 8-2 decision to the Red Sox in front of a sold-out and subdued gathering of 49,514. “At the end, it was ugly out there, on the field and off,’’ Yankees newbie Vernon Wells said. “I don’t blame them for leaving a little early.’’ Trailing 5-2 in the seventh, Francisco Cervelli and Brett Gardner started the frame by drawing walks against lefty reliever Andrew Miller. Suddenly, the crowd stirred in anticipation of a rally. But Eduardo Nunez (0-for-4, three strikeouts), Robinson Cano and Kevin Youkilis whiffed in succession. By the time the Red Sox spanked Joba Chamberlain for three runs in a wet ninth, the Stadium was almost vacant. “It got kind of raw in a sense,” manager Joe Girardi said. He was describing the wind and rain, but he easily could have been talking about the Yankees’ performance. Sabathia, whose arm strength is a growing issue, did not get his fastball past 92 mph and hit that only twice. He allowed four runs, eight hits and issued three non-intentional walks in five innings. “In the second inning, I got in trouble and couldn’t stop the bleeding,’’ said Sabathia, who gave up all four of his runs, four hits and two walks in the frame. “I need to do a better job of finishing innings.’’