I had a post a few weeks ago that listed his top comps from the past 15 years, but don't care enough to dig it up. Walker is the baseball equivalent of a long-drive champ. That's it. He can't actually play the game offensively. He's overrated, not underrated, because his weakness basically can't be fixed unless maybe he needs eye surgery. I mean, the minors are full of organizational players with no real shot at an MLB career. Generally they stay under the radar and are rarely discussed. Walker is a non-prospect just like they are, but because he hits home runs against minor league pitchers, he gets some attention (particularly from his relatives posting on TD). It's exciting for the minor league fans that get to watch him do it, but it's a pure sideshow with zero relevance to the Twins, now or ever.