Brewers manager Craig Counsell said Christian Yelich felt his back stiffen while moving on the base paths.
Yelich singled to rightfield in the fourth inning and felt his back stiffen when he was looking to steal second base, manager Craig Counsell said after the game. The rightfielder was replaced in the bottom of the fifth inning by Ben Gamel.
Counsell said Yelich is "sore," and he expects to give the reigning National League MVP a day off on Monday. The manager also said he thinks they will deal with Yelich's injury day to day and does not expect him to be placed on the injured list.
Yelich entered Sunday slashing .350/.459/.810 with an NL-leading 14 home runs and 34 RBIs.
The Brewers lost to the Mets 5–2 on Sunday but won their first series at Citi Field since 2014. Milwaukee will start a four-game home series against the Rockies on Monday.