Garrett is part of the Marlins' 60-man player pool, Craig Mish of SportsGrid.com reports.
Under normal circumstances, Garrett would have spent the 2020 season at Double-A and Triple-A. He has a strong three-pitch mix and logged a 52.7 percent groundball rate at High-A last year. Garrett is behind Sixto Sanchez and Edward Cabrera in the pecking order for MLB opportunities in 2020, but he could conceivably provide innings at the big-league level in a pinch.