Victorino's RBI single in the 10th lifts Sox past Yankees
The Yankees rallied to take an 8-7 lead when Lyle Overbay capped a six-run seventh inning with a two-run single, but Mariano Rivera was unable to make it stand up in the ninth.
Mike Napoli kept the inning alive with a two-out single, pinch runner Quintin Berry stole second and took third on a wild throw and Stephen Drew knocked him in with a looping single to right.
Jacoby Ellsbury singled with one out in the 10th against Joba Chamberlain (2-1), then stole second and scored on Victorino's single to right.
Will Middlebrooks also homered as the Red Sox increased their American League East lead to six games over Tampa Bay and the Yankees slipped nine games back in the division and three behind the Rays for the second wild card.
Robinson Cano drove in three runs for the Yankees. Ellsbury was 3-for-6 with an RBI and Ryan Lavarnway added two hits and two RBIs for Boston. Craig Breslow (5-2) walked one and didn't allow a hit over two innings for the win.
Koji Uehara retired the Yankees in order in the 10th for his 18th save. Uehara's 35 perfect relief appearances of one inning or more are eight more than any other pitcher in the majors.
GAME NOTEBOOK: The blown save was Rivera's sixth of the season, his most since 2003. ... Yankees starter Ivan Nova, who on Wednesday was named the AL Pitcher of the Month for August, lasted only four innings - allowing three runs on five hits. His Red Sox counterpart, Jake Peavy, was charged with four runs on six hits in six-plus innings, snapping a string of four straight starts allowing two or fewer runs. ... Cano's double in the third was his 30th of the season, making him one of four players in major-league history to begin his career with nine consecutive seasons with 30 or more doubles. The others are Albert Pujols, Earl Averill and Paul Waner.