Judging by your lineup, and the fact that Reyes went undrafted, I'd look for a good 2B to play until Reyes qualifies there. Adam Kennedy if you can get him back, or the best 2B available.
If O. Perez is Oliver, drop him. If it's Odalis, drop Lieber or Harden. Unless it's a keeper league, in which case: well done getting Reyes for free!
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