Mauer's plate discipline is enviable and if the Twins are suggesting he change that at all, they are doing him a disservice. Mauer has had the same hitting profile for as long as we have spray chart data. What probably confounded defenses in the past is now obvious for everyone to see. His grounders almost all go between first and second, and his flyballs almost always go to LF. Before this data exposed him, it was felt that Mauer could hit the ball anywhere. Now defenses know they can simply shift when Joe is at the plate and keep his OBP right where it is now. If Mauer wants to break out of his funk, he needs to change his timing a bit, try to mash everything for a home run (which would probably hurt his legs over time), or start trying to line drives whenever he can.