- Novosyolov developed within the Avtomobilist Yekaterinburg organization in Russia, gaining experience in the MHL, VHL, and KHL. He made his KHL debut during the 2025–26 season, appearing in three games with Avtomobilist.
- During the 2025–26 season, Novosyolov posted a 22-10-8 record, a 2.10 goals-against average, and a .932 save percentage in 40 regular-season games with Gornyak-UGMK of the VHL. He signed a two-year, entry-level contract with the Colorado Avalanche in June 2026 and joined the Eagles organization for the 2026–27 season.
