I kind of think SS arm strength is a little over-rated, mostly because even on the few occasions where the additional velocity actually will get the out, all we're talking about is an infield hit or possibly not getting the back end of a double play. An outfielder with a weak arm might let a guy get to 2nd, 3rd or score. An infielder with a weak arm, in almost all scenarios, is giving up what amounts to a walk. I'd guess a pitcher who has a 3.5 BB/9 as opposed to a pitcher who has a 2.5 BB/9 would end up allowing more baserunners than a SS with a below average arm. And I don't get too riled up over a 3.5 BB/9. Of course I'm talking about arm strength; accuracy is a different scenario.