The Pilgrims were beaten in their final away fixture of the National League U19 Alliance season at the Malcolm Arnold Academy in Northampton.
Jordan Tate scored the Pilgrims’ goal with the scoreline already at a 2-0 deficit.
Boston (4-2-3-1): Oliver Swaby; Jack Brown, Jack Withers, Callum Rodger, Sarok Ali; Taylor Gray, Jordan Tate (Leighton Boughen 50); Jenson Ball, Harrison Holland, Arkadiusz Michalczyk (Jamie Gaukroger 50); Jenson Bark (Marshall Young 50).