*Club domestic league appearances and goals, correct as of 19:14, 18 January 2025 (UTC) ‡ National team caps and goals, correct as of 22:51, 20 November 2024 (UTC)
Boatswain was born in Colchester. He played in the academy at Ipswich Town at under-18 and under-21 level, playing senior football for the first time when he was loaned out to Isthmian League club Bury Town in December 2022.[2] In February 2024, he was loaned to Southern Football League club Leiston.[3] In January 2025, he joined AFC Fylde on loan until the end of the season.[4]