BP stands for "Bull Pen"

The Pirates just announced that Shawn Chacon is headed back to the bullpen, effective immediately, and that John Van Benschoten will be called up to take his spot in the rotation. It's terrifying that the team's answer to solidifying the bullpen is to put Shawn Chacon back into it. JVB has 45 strikeouts and 30 walks in 66 minor league innings. That's not good.