Peter Bore scored a hat-trick as Grimsby thrashed Boston.
Bore headed home from five yards to convert Ciaran Toner's chip and then saw a shot palmed by Andy Marriott that James Hunt side-footed home.
Toner scored from 25 yards, while Boston duo Nathan Jones and Francis Green had efforts cleared off the line.
Boston's Drewe Broughton hit the bar before Bore headed his second and later scored at the near post, while Martin Paterson converted from close range.
Boston Utd: Marriott, Clarke, Thomas, Ellender, Nicholson, Green, Greaves, Vaughan, Farrell, Broughton, Joynes (Cooksey 46). Subs Not Used: Galbraith, Stevens, Cryan, Rowntree.
Booked: Clarke, Broughton.
Grimsby: Barnes, Bloomer, Fenton, Whittle, Newey (Croft 86), Boshell, Bolland, Hunt, Toner, Paterson (Till 82), Bore (Jones 87). Subs Not Used: Murray, Grand.
Booked: Bolland, Whittle.
Goals: Bore 4, Hunt 7, Toner 20, Bore 42, Paterson 63, Bore 78.
Ref: M Jones (Cheshire).