Sox up to 12th in the AL (after being dead last for most of the year) in runs allowed, they rank fifth in K's, and 11th in BB's allowed. Improvement.
As for the defensive side of things:
The Red Sox currently rank 7th in the Major Leagues in UZR/UZR150, 6th in defensive efficiency, and 4th in Park Adjusted Defensive Efficiency. All defensive metrics concur that the Red Sox currently boast one of the best defenses in baseball, and with a resurging rotation and consistently productive offense, looks like the April struggles are a thing of the past.