The Kings made the move Tuesday before Game 3 of their first-round series with the San Jose Sharks.
Fraser has won two Stanley Cup titles with Chicago in 2010 and Los Angeles in 2012. He has 39 games of NHL playoff experience.
Fraser was sent to the minors two months ago after managing just two assists in 33 games for the Kings. He missed five weeks with a broken hand in the AHL, returning to score six points in 10 games with Manchester.
Los Angeles assigned forward Linden Vey to Manchester on Monday.
The groove of being behind a bench is going to be interesting at first, but thank God we have a few exhibition games to get rid of those cobwebs. Overall the excitement of it all and the freshness and coming back refreshed, all those things are going to be assets. If [the players] come ready to give their best effort in practice and games, good things are going to happen. I'm always looking for results. It's not always on the scoreboard. It's winning and building something.
— Bryan Trottier on making his return to coaching as an assistant with the Sabres