Coach Darryl Sutter confirmed his leading scorer will sit out his second straight game Tuesday for the defending Stanley Cup champions.
Richards received a big hit from Chicago's Dave Bolland late in Game 1, and didn't play in Game 2 on Sunday despite participating in pre-game warmups. Richards hadn't missed a game all season.
Richards has 10 points in the playoffs. His absence is another blow for the low-scoring Kings, who are averaging fewer than two goals per game in the playoffs.