Any calculation that includes Bip's 85 speed and Lemke's 61?
Also, how do you incorporate the quality of the pitcher they're fielding behind? A "-" play behind 08 Joss is less likely to result in a run than it would behind an average pitcher. In addition, 08 Joss would face fewer batters per inning, resulting in fewer opportunities for Bip to make a "-" play or Lemke to make a "+" play. (Ditto playing in a pitcher's park v. A hitter's park.)
And how would replacing Bip with a defensive stud in the 8th and 9th innings affect his value as compared to Lemke's??
No, my methodology doesn't take into account speed, pitching or managerial strategy. But again, if the comparison isn't close, those factors will not tip the scales.
As far as pitching goes, you are correct that behind a low oav pitcher any individual defensive flub means less. However since minus plays are porportional to would-be-outs, bad range can really hurt behind a stud pitcher. Behind Joss or similar stud, I'd much rather have Lemke.