Bader seems to influence teams he is on; before he was traded to the Phillys, Kepler looked like a mirror image of Wallner.
Bader and Kepler both play Left Field and in the 7 games since Bader showed, Kepler is batting.318 with 7 hits including a home run.
I have a feeling Kepler is one who doesn't perform till a manager tells him: Either you perform as expected , or you will be sitting on the bench.