The Cubs are just over a quarter through their season so it seemed like a good time to look at quarter grades for the starting rotation. Rather than look at specific games or pitch maps in detail I tried to take a step back, as a result, this post will include some statistics at the quarter mark, plus batting average by pitch type for each Cubs starter.
First, some notes on the rotation as a whole. This was where the Cubs spent most of their resources in the offseason and there was a lot of excitement about the strength of the rotation when the season started.