With new head of football Jamie Raynor in the dugout for the first time, United's under-19s headed to Oldham Athletic for their second fixture of the new season.
Substitute Zac Hardy handed the Pilgrims an 85th minute lead at Chapel Road training ground, only for the Latics to equalise four minutes into added time.
Boston: Austin Barker, Finley Hipkin, Oliver Houlston, Charlie Brooks, Dexter Tomlinson, Finley Ging, Lewis Greenfield (Lake Taylor-Peak 87), Jake Thompson (Denis Matei 80), Will Pettitt, Toby Cotton (Oliver Callaby 65), Sean Bray-Smith (Zac Hardy 46).
Referee: Abid Hussain.