Tom Brady once beat the hell outta Wes Welker in a beer-chugging contest ... and it all went down during the best bar night EVER -- so says his ex-Pats teammate.
TMZ Sports spoke with ex-teammate-turned-Impact Wrestling star "Moose" (aka Quinn Ojinnaka) -- an OL who blocked for Tom during New England's '10 season -- and he says Brady's G.O.A.T. skills extend far beyond the gridiron.
Per Moose ... when the team got snowed in after a road game in Buffalo in Dec.