This has come up a few times on here re: Sale. Going into the season (going as far back as Sox Fest), Sale (much like Arrieta) and Cooper talked about him setting out to pitch to contact more this season, so this would obviously follow from that. Whether you believe that to be the primary reason or not (and therefore just a decline in performance) is up for debate. It hasn't really helped him go much deeper into games, though. His velo is down from last year but right in line with the rest of his career as a starter.