Marlins DFA John King, Recall Jack Ralston for MLB Debut
Miami designated left-hander John King for assignment to clear active roster space for right-hander Jack Ralston, who is set to make his big league debut.

The Marlins announced they have designated left-hander John King for assignment and recalled right-hander Jack Ralston from Triple-A Jacksonville, per the club announcement reported by AJ Eustace at MLB Trade Rumors.
Ralston had his contract selected earlier this month but was immediately optioned back to Jacksonville without appearing in a game. This time, per the report, he will make his MLB debut when he gets into a game. The move drops Miami's 40-man roster to 39.
What we don't know yet
The announcement does not include a timetable for when Ralston might appear, nor does it detail what comes next for King during the seven-day DFA window.
The Ralston recall had been anticipated — beat reporter Craig Mish had reported the callup was coming, and the club's official account subsequently posted the roster move. The club announcement reported here fills in the King side of the transaction, explaining how active roster space was created.
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Marlins DFA LHP John King, Recall RHP Jack Ralston for MLB Debut
Miami designated left-hander John King for assignment and called up right-hander Jack Ralston from the minors, with Ralston set for his MLB debut.
