Lucroy is being evaluated by doctors as part of the concussion protocol. He has to be cleared by the doctors before he can return to the lineup.
''Most likely a couple of days,'' Brewers manager Craig Counsell said Wednesday. ''It could be a day, but most likely a couple of days.''
The play occurred in the bottom of the seventh inning with Marcell Ozuna batting. Lucroy finished the game and struck out in his final at-bat as the Brewers fell 6-4.
''As the night went on he kind of got worse,'' Counsell said.
Lucroy is hitting .259 with seven home runs and 41 RBIs in 94 games after making his first All-Star appearance last season.