Mike Koster was born in 2001 and grew up in Chaska, MN. He graduated from Breakaway Academy in 2015. After attending Breakaway Academy, he went on to play high school hockey for the Chaska Hawks. Post-graduation, Koster played junior hockey in the USHL for the Tri-City Storm. In 2019, he was drafted into the NHL by the Toronto Maple Leafs as a fifth-round draft pick. After playing junior hockey for three seasons, he committed to playing Division I college hockey for Minnesota. He is currently playing as a defenseman for the Minnesota Gophers.
- » Breakaway Academy
- » USHL Tri-City Storm
- » U17 Five Nations Tournament Gold Medal
- » NHL Entry Draft Toronto Maple Leafs
- » U18 Hlinka Gretzky Cup
- » World Junior A Challenge Bronze Medal
- » University of Minnesota