Last 7 games, this is pretty remarkable. Following a day when the Yankees cut the Red Sox lead down to 3.0 games...
9/14 - Sox win 6-2, Yanks win 13-5, lead stays 3.0
9/15 - Sox win 13-6, Yanks win 8-2, lead stays 3.0
9/16 - Sox win 3-1, Yanks win 9-3, lead stays 3.0
9/17 - Sox lose 3-2, Yanks lose 6-4, lead stays 3.0
9/18 - Sox win 10-8, Yanks win 2-1, lead stays 3.0
9/19 - Sox win 1-0, Yanks win 5-2, lead stays 3.0
9/20 - Sox win 9-0, Yanks win 11-3, lead stays 3.0
The Yankees, since they beat the Sox in their last matchup of the season to cut the lead to 3.5 games, have gone 12-4, outscoring their opponents 105-58, and have only picked up a half game in the standings, because the Sox have gone 11-4 over that same time frame.