Keskinen is Columbus' 2023 7th-round pick (194th overall) and has signed a three-year, entry-level contract on Friday. The 21-year-old center represented Finland at the 2025 World Jr Championships and spent the entire 2024-25 season with Tappara (Liiga), where he scored 15 goals and 35 points in 59 games played in Finland's top league.