Kinley had been a part of the Marlins since getting drafted out of Barry University in the 2013 MLB Amateur Entry Draft, in the 16th round until mid-2018. He logged 258 innings of minor league work in the balance, going 11-15 with a 3.57 ERA and 54 saves to his credit.
Post-2017, the Minnesota Twins selected Kinley in that seasons’ rule 5 draft. After allowing nine runs in three innings of work over four contests, the Twins sent him back to the Marlins.
Kinley was notably better with Miami than he had showed with the Twins.