JUPITER, Fla. (AP) - St. Louis Cardinals pitcher Alex Reyes has a sore right elbow and will have an MRI.

The 22-year-old right-hander his major league debut last Aug. 9 and was 4-1 with a 1.57 ERA in five starts and seven relief appearances. His fastball averaged more than 97 mph.

“I think what led to the concern was just some discomfort and whenever you go through those manuals–through the ortho exam, they just thought it was in his best interest,” said General Manager John Mozeliak. “Rather than speculate on anything right now, just wait until tomorrow and once we get the read.”

Reyes, a candidate for the final spot in the starting rotation, had been feeling soreness in the days leading up to camp, St. Louis general manager John Mozeliak said Tuesday. Reyes' participation on the Dominican Republic's World Baseball Classic team is uncertain.

Adam Wainwright, Carlos Martinez and Lance Lynn are projected as the first three St. Louis starters, and Michael Wacha and Mike Leake also are candidates. Reyes could start the season in the bullpen in an effort to limit his workload.

Reyes had been slated to throw in a pitching group with Adam Wainwright as workouts for pitchers and catchers officially began this morning. But as the groups began their workouts, Reyes — who was present at the complex — was not involved. Manager Mike Matheny explained the right-hander’s physical was not yet completed.

“Anytime you’re taking some to go get an MRI, it’s not great news,” acknowledged Mozeliak, noting the issue was not sudden. “I know he’s been throwing and I know recently he’s felt some discomfort — which he shared with our medical staff and subsequently, we are where we are.”

Besides Reyes, the likes of Michael Wacha, Luke Weaver, and Trevor Rosenthal are among those in contention for the fifth spot in the Cardinals rotation.

To hear the full interview with John Mozeliak, visit this story on STLBaseballWeekly.com.