Kings general manager Dean Lombardi said defenseman Willie Mitchell underwent platelet rich plasma therapy Tuesday for his surgically-repaired right knee, but there is no timetable for his return to the lineup. Mitchell has had a number of setbacks after undergoing surgery to repair torn meniscus in December.

Meanwhile, Lombardi also said defensemen Matt Greene (back surgery) and Alec Martinez (upper body injury) were on schedule to return from their injuries. Greene is actually ahead of schedule and might be back before the end of the regular season, with Martinez expected to be fit to play “shortly,” according to Lombardi.