"From our standpoint, we needed to talk about something other than coming close," Hitchcock said. "You can only go to that well so many times and players stop believing.
"We've got experience now to draw on."
Steen also scored on a power play in the first period for the Blues, who ended an eight-game losing streak against the team that swept them in the second round last spring.
The Kings were 4-0 in overtime during last season's Cup run. They had been on a roll, outshooting the Blues 7-0 after coach Darryl Sutter called timeout.
"I thought we were starting to come around," defenseman Rob Scuderi said. "But overall, you've got to push it under the rug, as hard as it is sometimes, and try and come back fresh."
Notes: Kings D Robyn Regehr went straight to the dressing room after getting his face bloodied by a skate in the opening minute of the third but only missed a few shifts. The game was delayed for a few minutes while workers dealt with a pool of blood behind the Kings' net. ... Blues F T.J. Oshie returned from a 15-game absence following ankle surgery and bumped slumping rookie Vladimir Tarasenko, who had three assists in the last 15 games, from the lineup. ... Blues D Jay Bouwmeester was the second-most experienced player in NHL history to make his playoff debut according to STATS, getting to the postseason after 764 regular-season games. Only Olli Jokinen (799) waited longer.