To make room for utility fielder Short the SOX optioned Valdez to WOO. Short can play every position except catcher and pitcher, but can't hit a lick. Short was acquired from the Mets for cash considerations. He was DFA'd by the Mets to make room for J.D. Martinez.
I thought the SOX would option Hamilton, but it appears they kept Hamilton because he can also play SS and he's faster on the bases (PR).
Good luck to Valdez; he had a big hit yesterday and had made some very good defensive plays at 2nd of late.