no one and that's the problem. i would have no problem seeing someone compete with Penny for the starting SS job, but there isn't anyone that can do any better, IMO. we can hope that Hicks can find himself at the plate, but i don't think that's going to happen this season, if at all. i'm sure most of us agree that Sogard and Rosales can't challenge Penny for the spot. Green's bat can challenge Penny, but not his defense. so, we can only hope that that 1st rounder is magical and will blow through the farm system to challenge Penny, but i don't see that happening.
if Norris can make adjustments at the plate (he's in an 0-fer slump, himself), i can see him taking Zuki's spot probably by season's end. that's if Zuki continues his current lack of offense. however, i like Zuki as a backup. he's an expensive backup, but do we all really believe that Donaldson or Recker are better than Zuki?
no one to take over for Inge. it doesn't look like the A's are rushing Green into that 3B spot down in AAA so i doubt he'll be coming up anytime soon. i don't think Parker is ready at all yet either, that is, if people feel he's a better solution at 3B. i haven't really kept track of the lower prospects too much this season because i've been enjoying the A's so much more this season. not sure who else is being groomed for 3B. i see bclark talking about Head a lot, but as it would seem, he'll probably be getting moved to 1B.
so, at the moment, beggars can't be choosers and the A's are working with what they've got and they're doing well enough as is. unless Beane can somehow work a deal to get a decent ML SS or a 3B/SS prospect that is ready now, i don't see Penny or Zuki getting moved anytime soon. although they're not doing great, the only way they'll get moved is if it's a can't miss type of deal, IMO.