Complex sentence: Erskine was born in Kingston, Ontario, but grew up playing minor hockey in his hometown of Ajax, Ontario for the Ajax Knights of the OMHA's York-Simcoe League and the Ajax-Pickering Raiders AAA of the OMHA's Eastern AAA League.
Split into simpler sentences: Erskine was born in Kingston, Ontario, but grew up in Ajax, Ontario. Erskine grew up playing minor hockey in his hometown of Ajax, Ontario for the Ajax Knights of the OMHA's York-Simcoe League and the Ajax-Pickering Raiders AAA of the OMHA's Eastern AAA League.