He played his first professional games in 2009 for SC Langenthal in the National League B before moving to North America to join Portland in the 2010–11 WHL season, where he finished as the runner-up for the league's Rookie of the Year award.
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Bärtschi began his professional career in 2009–10 for SC Langenthal in the Swiss National League B and was pursued by SC Bern of the National League A.