Manager Torey Lovullo said after Tuesday's game against the Phillies that Carroll reported discomfort in his lower back, Jack Sommers of SI.com reports.
The Diamondbacks don't seem overly concerned about Carroll's back, as he played the entirety of Tuesday's contest and is also expected to start Wednesday, but it could be something worth monitoring going forward. Jorge Barrosa would be a likely candidate to start in right field if Carroll were to miss any time.