Lehtera (head) has been ruled out for Monday's game against the Kings, Tom Timmermann of the St. Louis Post-Dispatch reports.

EDGE Analysis

Lehtera didn't even make the trip with the Blues to Los Angeles, suggesting that his status for the remaining four games of the team's West Coast road swing could be peril. The center first succumbed to the head injury after taking a puck to the head in Friday's win over the Ducks, but the Blues haven't indicated whether Lehtera is suffering from concussion-like symptoms.