The Pilgrims were beaten 3-1 by Sheffield United College at Handsworth FC.
United's afternoon had got off to the perfect start with Josh Panton unleashing a screamer inside 30 seconds – but two goals before the break and a third afterwards sealed the Pilgrims' fate.
Boston: Sam Buckland (Alfie Harney 80), Archie Bradford, Tyreece Keating, Toby Cotton, Kirils Snikeris, Elod Nadasdi, Aron Ealham (Toby Foreman 80), Josh Panton, Freddie Shinn (Denis Matei 55), Daniel Bridges, Sam Finch (Joe Todd 60).