Bailey (side) isn't in the Giants' lineup for Tuesday's game against the White Sox, Susan Slusser of the San Francisco Chronicle reports.
Bailey was a late scratch from Monday's lineup due to right side tightness. While the Giants believe his injury is relatively minor, they'll send the 25-year-old backstop in for an MRI just to be safe, per Alex Pavlovic of NBC Sports Bay Area. In the meantime, Curt Casali will start behind the plate and bat ninth Tuesday.