Lopez was optioned to minor-league camp Monday.
Lopez was ineffective this spring with the Brewers, allowing seven earned runs in 2.1 innings (27.00 ERA) over two appearances, but he did give up just one earned run and struck out five batters in his most recent appearance, which came with Puerto Rico in the WBC. Lopez had a trying 2016 season, finishing with a 5.78 ERA over 25 outings, which hurt his prospect status a bit. However, he is still just 24 and was far better the previous year (2.26 ERA over 24 minor-league starts), so he remains a potential starter for the Brewers at some point this season or next.