So are you willing to give up JJ's glove for Billy's bat when we already do that at 2 other infield positions? If Hall displaces any middle infielder, it's gonna be Weeks, as Hall isn't a great SS, but is a decent 2B, plus Weeks is obviously the most likely infielder to need a change of position. Hall could still play center field if Weeks steps up his D. Hall's offense would still be good enough at that position (though it'd be better at 2nd or SS). We have one more year of Clark, Koskie, and Jenkins, plus Lee will be gone this fall/winter. Thus far, we have Hall, Braun, Hart, and Cruz to fill those spots. Hall will find a home if he keeps hitting.