Naylor exited Thursday's game against the White Sox due to shoulder soreness, Daniel Kramer of MLB.com reports.
Naylor grimaced during a swing in the third inning and departed shortly thereafter. The initial diagnosis doesn't sound particularly ominous with Naylor labeled day-to-day, though he could undergo imaging with more details to follow. The first baseman also played through some shoulder soreness in June, but it's unclear if that's related to the current injury.