The White Sox placed Lopez on waivers Thursday, Kiley McDaniel of ESPN.com reports.
In his first season with the Southsiders, Lopez has slashed .238/.310/.290 with five steals, 33 runs and 17 RBI across 387 plate appearances. The other 29 clubs now have the opportunity to add the 29-year-old to their roster for the final month of the season and pay what's left of his $4.3 million salary. However, his poor performance makes it likely that he passes through waivers unclaimed and remains with the Sox.