Phaneuf officially announced his retirement from the NHL on Tuesday.
The Kings announced Saturday that they have bought out the remainder of Phaneuf's contract.
Phaneuf recorded an assist, 13 shots on net and 12 blocked shots in 10 games during January.
Phaneuf (upper body) has been activated off injured reserve, but he won't play Saturday against Vegas, Jon Rosen of Fox Sports West reports.
Phaneuf (upper body) took part in contact drills during Friday's practice, Jon Rosen of Fox Sports West reports.
Phaneuf (upper body) was placed on injured reserve Saturday, Helene Elliott of the Los Angeles Times reports.
Phaneuf (upper body) has been labeled week-to-week by coach Willie Desjardins, Curtis Zupke of the Los Angeles Times reports.
Phaneuf exited Tuesday's game versus the Sabres with an undisclosed injury and didn't return for the third period, Curtis Zupke of the Los Angeles Times reports.
Phaneuf scored a goal in Wednesday's 7-4 preseason loss, going minus-4 in the process.
Phaneuf contributed a goal and an assist, helping his team post a 3-0 win over Calgary on Monday.