Robinson Cano and Tony Womack threw out runners at the plate in the sixth inning to keep Boston from building a big lead, and Cano and Sheffield hit impressive home runs during a five-run rally in the bottom half, leading the New York Yankees to a 6-3 victory Friday night. "A big game," said Sheffield, whose tiebreaking, three-run drive wound up in the first row of the rarely reached left-field upper deck. New York, 11-19 three weeks ago following its worst start since 1966, has won 16 of its last 18, including nine straight at home. The Yankees are second in the AL East, 3? games behind Baltimore.