On the mark for the Brigg team were Sol Hari, Tom Raithby and Neil Gallafent.
Former Brigg Town cricketer Lee Fielden netted for Barnetby United in their 6-1 defeat by Epworth Town in division one.
On Saturday, April 23, Briggensians will play College Wanderers (WRFC) Reserves at Sir John Nelthorpe School.
Brigg Town FC's Hawthorns ground is the venue for the league's Challenge Cup final on Thursday, April 28.
Epworth Town will meet Limestone Rangers (K.O. 7-30pm).