As is usually said when this comes up, I doubt Coles has any affect on the hitters good or bad. Braun is going to do his thing, regardless of who the coach is. Same with basically every veteran like Cain and Yelich. No one is going to get Santana to make more contact, other than Domingo deciding to change his approach. Villar is a total dunce in all phases of the game, no one's going to fix him. The only thing I can fault Coles for is Arcia. He looks like a pitcher at the plate sometimes, totally lost with little idea of how to swing a bat. And he's been that way since he was called up. For all we know, though, they might be working on things with him all the time and it doesn't stick or he totally ignores it. I do find it interesting that pitching coaches can actually get players to change their game. You hear it all the time from the Brewers pitchers that DJ wants them pitching up in the zone and they do it. Certainly, very few of these guys have ever been told to throw the ball up before but yet they're doing it now. On the other hand, rarely do you see hitters make any sort of adjustment to their game other than minor batting stance changes. Even the players that have been on the leading edge of the "launch angle" revolution made their swing changes on their own and worked with their own personal coaches, not team personnel.