EL SEGUNDO, Calif. -- Los Angeles Kings defenseman Robyn Regehr has a knee injury, coach Darryl Sutter said Thursday.

Sutter revealed the injury on the first off day after Game 2 of the Western Conference Final against the Chicago Blackhawks; tt was previously undisclosed. Regehr has been out since May 3, when he was hit by Anaheim Ducks right wing Teemu Selanne against the end boards in Game 1 of the Western Conference Second Round.

Asked if Regehr was cleared to skate, Sutter said, "Robyn's not skating. When Robyn's ready to skate, he'll skate. It's a knee injury, and obviously he'll make that decision. If he could play on one leg, he would. He showed it last year in the playoffs … if there's a way to skate, he'd be playing."

Los Angeles has used Jeff Schultz and Matt Greene in place of Regehr, one of their penalty-killers and more physical defensemen. The Kings got injured defenseman Willie Mitchell back for the conference final.

Game 3 of the best-of-7 series, tied 1-1, is Saturday at Staples Center (8 p.m. ET; NBC, CBC, RDS).