Merryweather has been designated for the 60-day injured list with a rib stress fracture in his back, and he will be out of action until the start of June at the earliest.
Kilian has been posted to the 60-day injured list with a teres major strain in his right shoulder, and he is not expected to be available until the middle of July.
Bradford has been assigned to the 15-day injured list due to back soreness. He is also dealing with a stress fracture in his rib and there is no timetable for recovery.
Mahle is on the 60-day injured list while recuperating from Tommy John surgery, and he is unlikely to be available until sometime in July at the earliest.
deGrom has been moved to the 60-day injured list after having Tommy John surgery on his right elbow, and he is not likely to make his season debut until the middle of July.