Mason stopped 34 of 37 shots including four in the tiebreaker. Anaheim's Jonas Hiller stopped five shootout attempts to improve to 13-5 over the last 18 games.
Ryan says the comeback should give his team a shot of confidence as it continues its 13-day, six-game road trip. Anaheim lost to San Jose 3-1 on Thursday in the first game of the swing.
"This was monumental," Ryan said. "It was like a playoff game. This shows that we're a very resilient team, able to bounce back in the face of almost everything."
Ryan recorded 10 shots on goal.
Anaheim forward Teemu Selanne missed his fifth straight game (broken jaw). He underwent surgery Jan. 14 and is expected to be out at least two more weeks. The injury could keep him from playing for Finland next month at the Vancouver Olympics. ... The Blues have scored first in nine of 10 games. ... Anaheim is 7-1-1 in its last nine games against St. Louis. ... The Ducks have killed off 20 of 22 penalties.
Copyright by STATS LLC and The Associated Press
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