Phelps will be limited to single-inning outings in an effort to ease his transition to a high-leverage role in the Miami bullpen, MLB.com reports.

"We want to use Phelps later and ant to try and keep him at one [inning]. ... Trying to Keep him strong," manager Don Mattingly said of his emerging bullpen weapon. Phelps has spent time as a starter and swing man during his previous four years in the majors, but given the Marlins' depth in the rotation, the team is committing to Phelps as a full-time reliever. He's allowed two runs with 11 strikeouts over nine innings so far this year while establishing himself as the team's top setup option. Phelps is also now the likely next man up for spot saves if A.J. Ramos is unavailable.

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