The problem is, traditional thinking was you had to be "strong up the middle" defensively, so middle infielders who mostly considered for their glove. Any offense you got was gravy. First base was an offensive position. dWAR starts first basemen out with -15, because it was where you put your slugger. Any D is a plus. But we can see first basemen saving errors (and runs), so you can't just look at their own errors. But the perception of first being an offensive position persists to this day. Bobby was not elected because he did what he was supposed to, but not as well as the voters thought. Keith wasn't elected because he didn't do what was expected, but did what was he wasn't supposed to do extremely well, and that wasn't appreciated. Later