This month, the bullpen leads the Major Leagues with a 0.94 ERA, allowing three earned runs over 28 2/3 innings.
There have been various factors to the resurgence, including the return from injury of Koji Uehara, the recall of Joe Kelly from Triple-A Pawtucket and the recovery of Brad Ziegler, who was quarantined for nearly a week with the flu.
Thanks in large part to the rejuvenation of the bullpen, the Red Sox hold a two-game lead in the American League Eastover Toronto and Baltimore with 18 games left.