The Challengers won the opener of their best-of-five semi-final series with the Therwil Flyers on Saturday, September 13, as the C's rallied for a 4-3 victory at Therwil. The team of head coach Chris Palatinus trailed by two runs in the seventh, as Bryan Shemley and Ryan Byrne reached base, before Amado Tomas Tabilis hit a bomb over the left field fence for a three-run homer to make it 4-3. Ryan Byrne tossed a complete game for his first postseason win with the C's. Game 2 will take place on Sunday, September 14 at 4 pm at the Heerenschürli ballpark.

The Zürich Barracudas beat the Luzern Eagles 9-2 to take Game 1 in the other semi-final series.