Again, they aren't really getting on in the first place, and with so few threats, it's easy for a pitcher to walk the one guy who could do damage in a situation to get to the next schmuck. Everybody is focused on leaving men on, but with a .311 OBP with nobody on, they still need to focus on getting more people on base overall. And the difference in SLG with runners on and nobody on is probably closely related to Soriano, who has a heck of a lot of PA with nobody on than with runners on.