The slumping Los Angeles Kings have fired coach Terry Murray and named assistant John Stevens as interim coach, the National Hockey League (NHL) team said on Monday.The firing comes with the Kings (13-12-4) on a four-game losing streak and ranked 12th in the 15-team Western Conference.     Murray, 61, had been the Kings coach since the 2008-09 NHL campaign and compiled a 139-106-30 regular season record.Stevens, 45, coached the Philadelphia Flyers from 2006 through most of 2009, posting a 120-109-34 record, while leading the Flyers to the Eastern Conference Finals in 2008.He has been with the Kings since the 2010-11 season.