Lopez was sent to Double-A Biloxi on Tuesday, the Milwaukee Journal Sentinel's Tom Haudricourt reports.
There was some suspicion that the Brewers might go this route with Lopez, who was utterly traumatized at Triple-A Colorado Springs last season (6.81 ERA, 1.97 WHIP), but had a bit more success after getting demoted to Double-A (3.97 ERA, 1.35 WHIP). His breaking ball wasn't breaking in the harsh conditions at Colorado Springs, and his confidence was shot, so the Brewers are focused on avoiding a similar disaster this season. Lopez could skip Triple-A entirely if he is pitching well at Double-A this season, and is a candidate to join the big-league rotation this summer.