Johnson has been activated from the 15-days injured list after recovering from a right elbow inflammation, and it is unknown if he will suit up for Monday's clash against the Padres.
Perdomo has been placed on the 60-day injured list while recovering from Tommy John surgery, and he has been shut down for the remainder of the season.
Strider has hit the 15-day injured list while recovering from surgery to repair a UCL injury to his right elbow, and he will be sidelined for the remainder of the season.
Hurt has been sent to the 60-day injured list with right shoulder inflammation, and he is not expected to be activated until at least the beginning of June.
Kershaw is expected to remain on the 60-day injured list until at least the end of July while he recovers from surgery to repair the gleno-humeral ligaments and capsule in his left shoulder.
May has been shuttled to the 60-day injured list after having surgery to repair his flexor and UCL in his right elbow, and he is not likely to suit up until the end of July.