Dayle Southwell scored a late equaliser to earn play-off chasing Grimsby a point against Welling United.
An acrobatic finish from midfielder Joe Healy put the visitors ahead early on in the first half.
Craig Disley headed against the post and Alex Rodman saw his effort tipped around by keeper Lee Butcher as Grimsby searched for an equaliser.
And it was Southwell who made the breakthrough, poking in from close range deep into injury time.
VIEWS FROM THE DRESSING ROOM
Grimsby Town boss Paul Hurst told BBC Radio Humberside:
"It looked like we were going to lose it. Credit to the players, they kept going to the end and the goal came from what I was looking for us to do.
"I thought we stayed a little bit nice with our play. Overall, I don't think we were second best.
"Frustration is the main word in terms of some of our passing.
"Saturday's game had taken something out of us. Welling had a game Saturday and went to Plymouth and they got beat 3-0."
Grimsby Town 13 McKeown 03 Thomas 05 Pearson 12 McDonald Booked (Southwell - 82' ) 02 Hatton 23 Rodman 11 Neilson (Colbeck - 63' Booked ) 04 Kerr Booked 08 Disley 14 John-Lewis (Cook - 66' Booked ) 17 Hannah Substitutes 09 Cook 07 Colbeck 20 Southwell 26 McLaughlin 15 Bignot Welling United 18 Butcher 14 Hudson 05 Franks Booked 31 Vanderhyde 26 Cargill 33 Healy (Cumbers - 79' ) 27 Day 04 Gallagher Booked 15 Dyer 09 Guthrie Booked (Bassele - 59' ) 10 Lafayette Substitutes 25 Cumbers 13 Turner 30 Bassele 21 Beautyman 03 Obersteller