SLG shouldn't be considered at all when choosing a leadoff hitter, as a matter of fact, the higher the SLG percentage is, the better it is for the hitter to hit 3rd or 4th, not only homeruns go to waste, but doubles & triples too, yes a homerun is good, but its better when there are men on base, if managers think that way, we'd see Gonzalez, Pujols, & Cabrera as leadoff hitters, just to save them a couple of extra plate appearances (in the end, they'd get less RBIs), both Ellsbury & Crawford had pathetic OBP in the past, & we don't know which Crawford (OBP-wise) would show up just as much as we know Ellsbury, so the SLG percentage is the tie breaker, the better slugger shouldn't be the leadoff hitter.