Rubuta ci gaba don wannan sakin layi - A ranar 23 ga Yuni, 2017, a cikin 2017 NHL Entry Draft, Flyers sun yi musayar Schenn zuwa St. Louis Blues a musayar Jori Lehtera, zagaye na farko na 2017 (na 27 gaba ɗaya) da kuma yanayin 2018
zabin zagaye na farko. A kakar wasa ta farko tare da Blues, Schenn ya fashe kuma ya sanya mafi girman aiki a cikin maki, taimakawa, da burin. Ya yi rikodin hat-trick na uku a ranar 5 ga Disamba, 2017, a cikin nasara 4-3 a kan Montreal Canadiens kuma ya jagoranci Taurari Uku na Makon. A watan da ya biyo baya, an kira Schenn zuwa 2018 National Hockey League All-Star Game bayan rikodin maki 42 a wasanni 32. Ya gama kakar wasa da maki 70 a wasanni 82.