Flores is set to have an MRI on his throwing shoulder Tuesday, Jenifer Langosch of MLB.com reports.
Flores, who is a non-roster invitee to Cardinals camp, was sent to have an MRI after he was experiencing shoulder discomfort. It's a tough day for St. Louis pitchers, as top pitching prospect Alex Reyes also had an MRI on his throwing arm. The severity of the injury still isn't known and we will wait on the MRI results before more can be determined.