Lopez was transferred from Triple-A Colorado Springs to Double-A Biloxi on Tuesday, Tom Haudricourt of the Milwaukee Journal Sentinel reports.
Lopez has had a rough season both in the thin air of Colorado Springs and on the road, so the Brewers decided to move him down a level in hopes of getting him back on track. Lopez made his major league debut last season, and if he rebounds as the Brewers hope, he could get another shot with the big club before the current campaign comes to a close.