Two excellent goals from Mikael Mandron along with a goal apiece for Lyndon Gooch, Daniel Wright and former United loanee Liam Agnew were enough to give Sunderland victory.
Boston did have their chances, with Jay Rollins' excellent cross just missed by Cameron Johnson while Jake Sheridan and Carl Piergianni both had efforts cleared off the line in the first half.
Boston (4-4-2): Henrich Ravas; Zak Mills, Scott Garner, Carl Piergianni, Liam Marrs; Jay Rollins (Kaine Felix 46), Grant Roberts (Trialist 46) , Jake Sheridan (Kyle Dixon 46), Jamie McGhee (Jordan Deacey 46); Cameron Johnson (Mark Jones 46), Jack Friend (Dayle Southwell 46). Sub (not used): Sam Vince (gk).
Referee: Darren Drysdale.
Attendance: 358.