Garrett is dealing with an elbow injury and has been shut down at Low-A Greensboro, Mike Rosenbaum of MLBPipeline reports.
The Marlins' top pitching prospect was off to an impressive start to his professional career with Low-A Greensboro, posting a 2.93 ERA and 16:6 K:BB ratio over his first 15.1 innings. It's currently unclear as to what the exact injury is, but it's a tough break for Garrett and the Marlins' organization nonetheless.