Kings coach Terry Murray clarified that Williams' non-surgical recovery from the injury would take three or four weeks before another assessment would be made. That would take Williams beyond the regular season.
Williams was injured with about 9½ minutes remaining in regulation Monday night in a 2-1 shootout victory against the Calgary Flames at Staples Center. Williams was checked into the left-wing boards by Calgary defenseman Robyn Regehr and slowly skated off the ice. Williams sat hunched over on the bench for about 60 seconds before heading to the locker room.
After suffering through three consecutive injury-plagued years, Williams was one of eight Kings who had appeared in every game this season, producing 22 goals and 35 assists. He was having his most productive season since 2006-07 with the Hurricanes. Williams, 29, signed a four-year contract extension Feb. 28, which will reportedly pay him $3.6 million a year.
To fill the roster spot, the Kings have called up Oscar Moller from the AHL's Manchester Monarchs. Moller, 22, played four games for the Kings in December, totaling a goal and two assists.
The Kings are currently fifth in the Western Conference standings, but just three points out of ninth heading into their game Thursday against visting San Jose.
Dan Arritt covers the Kings for ESPNLosAngeles.com.