Of course, since he was copying off Josh Donaldson's swing notes, that makes sense. But it's that profile of a guy who had talent he wasn't harnessing and moves very decisively toward harnessing it that appeals to me. Raul Ibanez would be another guy who had to adjust, but he did his in the majors. I don't know whether Haniger will hit the ground running, but if the Mariners intend to have a successful playoff-bound season it would certain help for him to strap on his Donaldson cleats and get busy producing immediately.
But a guy who can improve his own swing via video and trial should love getting to work with Edgar. Nobody's going to be able to help him more. Investing in Edgar Martinez, Swing Whisperer is gonna be crucial for getting the new kids like Haniger and soon O'Neill to harness what they can do, and mitigate what they're bad at.
Fingers crossed for a good, healthy season from at least one of those guys.