DeSclafani was called up Sunday as an extra arm for a taxed bullpen but did not pitch since joining the Marlins. Over five big-league starts, DeSclafani is 1-2 with a 7.40 ERA.
Realmuto, who made his major-league debut in June with starter Jarrod Saltalamacchia on the concussion list, went 4 for 20 with five RBI in seven games. In 71 games with the Suns, Realmuto was batting .301 with 21 doubles, six homers and 46 RBI.
Miami had been playing a position player short by bringing up DeSclafani and sending down utility player Ed Lucas.