Flores was scratched from Wednesday's game due to a possible side injury, Kristie Ackert of the New York Daily News reports.
Flores appears to be dealing with a lat or oblique issue, either way, the 26-year-old will be out of the lineup for the third contest of a four-game set against the Yankees. It's unclear as to when Flores would've suffered an injury -- he's started the past three games -- but more information is likely to become present on his condition prior to the start of Wednesday's game.