Grimsby reignited their play-off push by overcoming Blue Square Bet Premier strugglers Stockport.
The Mariners, winless in six league games heading to Edgeley Park, relied on a post to keep out Mark Cullen's first-half effort.
But Ross Hannah's 20-yard strike and a Sam Hatton free-kick were enough for victory, with Alex Kenyon turning in a consolation for Stockport.
The hosts saw Andy Halls sent off for a second yellow late on.
And the Hatters are now one point adrift of safety, while fifth-placed Grimsby have a four-point cushion over Forest Green in sixth.
VIEW FROM THE DRESSING ROOM
Grimsby joint manager Paul Hurst told BBC Radio Humberside:
"It was vitally important to win given the other results today.
"We felt if we had a bit of quality in and around their area then we would score.
"The goal Ross Hannah got was an excellent one and I'm really pleased for him.
"One or two looked a bit tired today, there are some lads who have played every game since Wembley."
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Live Text Commentary
Full Time The final whistle is blown by the referee.90:00 +6:26
Dayle Southwell is caught offside. Direct free kick taken by Sam Sheridan.90:00 +5:30
Lenell John-Lewis is adjudged to have handled the ball. Free kick crossed left-footed by Sean Newton, Bradley Wood makes a clearance.90:00 +4:53
Foul by Cleveland Taylor on Sean Newton, free kick awarded. Paul Marshall takes the free kick.90:00 +4:21
Foul by Jon Macken on James McKeown, free kick awarded. Free kick taken by James McKeown.90:00 +3:15 Dismissal
Dismissal Andy Halls is shown a red card.90:00 +1:58
Mark Cullen takes a shot. Blocked by Bradley Wood.90:00 +0:30 Substitution
Substitution Lenell John-Lewis is brought on as a substitute for Andy Cook.89:28
Outswinging corner taken by Sam Sheridan from the right by-line played to the near post, Bradley Wood manages to make a clearance.87:57
Paul Marshall takes a shot. James McKeown makes a save. Corner taken by Sam Sheridan, Andy Cook makes a clearance.85:17
Direct free kick taken by James McKeown.85:17 Substitution
Substitution Paul Marshall comes on in place of Alex Kenyon.85:17
Foul by Andy Halls on Bradley Wood, free kick awarded.79:23 Substitution
Substitution Dayle Southwell joins the action as a substitute, replacing Ross Hannah.78:35 Substitution
Substitution Marcus Marshall goes off and Cleveland Taylor comes on.78:21
Jon Nolan takes a shot. Save by James McKeown.77:26
Mark Cullen takes a shot. Sam Hatton gets a block in.76:44
Joe Colbeck takes a shot. Save by Richard O'Donnell.74:30
Andy Halls fouled by Craig Disley, the ref awards a free kick. Direct free kick taken by Andy Halls.73:29
Outswinging corner taken left-footed by Sean Newton from the left by-line to the near post, The ball is sent over by James Tunnicliffe, Sam Hatton makes a clearance.
Mark Cullen produces a left-footed shot from the edge of the area and misses to the left of the goal.69:16
Ross Hannah takes a shot. Richard O'Donnell makes a save.68:06 Substitution
Substitution Sam Sheridan replaces Danny Schofield.67:50
Alex Kenyon produces a right-footed shot from just outside the area that goes harmlessly over the bar.66:53
Corner taken by Joe Colbeck from the right by-line to the near post, Alex Kenyon manages to make a clearance.65:46
The ball is delivered by Joe Colbeck, Shaun Pearson takes a shot. Blocked by Alex Kenyon.65:46 Booking
Booking Andy Halls goes into the book for unsporting behaviour.65:41
Bradley Wood fouled by Andy Halls, the ref awards a free kick.63:48
Free kick crossed right-footed by Danny Schofield, clearance by Shaun Pearson.63:48 Booking
Booking Sam Hatton goes into the referee's book for unsporting behaviour.63:23
Sam Hatton concedes a free kick for a foul on Jon Nolan.62:51 Substitution
Substitution (Stockport County) makes a substitution, with Jon Nolan coming on for Danny Whitehead.61:48
Free kick awarded for an unfair challenge on Joe Colbeck by Lee Bullock. James McKeown takes the free kick.60:06
Assist on the goal came from Danny Whitehead.60:06 Goal scored
Goal! - Alex Kenyon - Stockport 1 - 2 Grimsby Alex Kenyon scores a goal from close in to the bottom right corner of the goal. Stockport County 1-2 Grimsby.59:12
Outswinging corner taken by Danny Schofield from the right by-line.56:59
Andy Cook produces a left-footed shot from the edge of the area and misses to the left of the target.56:08 Goal scored
Goal! - Sam Hatton - Stockport 0 - 2 Grimsby Sam Hatton grabs a goal direct from the free kick from just outside the box to the bottom right corner of the goal. Stockport County 0-2 Grimsby.55:22
Free kick awarded for a foul by Jordan Fagbola on Andy Cook.53:23
Joe Colbeck takes a shot. Richard O'Donnell makes a save.51:40
Mark Cullen takes a shot. Save made by James McKeown.50:16
Marcus Marshall fouled by James Tunnicliffe, the ref awards a free kick. Sam Hatton restarts play with the free kick.48:29
Sam Hatton restarts play with the free kick.48:29 Booking
Booking Booking for Alex Kenyon for unsporting behaviour.48:20
Alex Kenyon gives away a free kick for an unfair challenge on Ross Hannah.47:08
The assist for the goal came from Marcus Marshall.47:08 Goal scored
Goal! - Ross Hannah - Stockport 0 - 1 Grimsby Ross Hannah scores a goal from just outside the penalty box to the top right corner of the goal. Stockport County 0-1 Grimsby.46:11
Effort from outside the penalty box by Bradley Wood goes wide right of the goal.45:01
The second half has started.45:00 +1:03 Half time
Half Time The referee calls an end to the first half.40:24
Foul by Danny Whitehead on Joe Colbeck, free kick awarded. James McKeown takes the direct free kick.40:08
Mark Cullen produces a left-footed shot from deep inside the penalty box and strikes the post.39:29
Ross Hannah is ruled offside. Free kick taken by Richard O'Donnell.37:48
Outswinging corner taken left-footed by Sean Newton from the left by-line, Shaun Pearson manages to make a clearance.37:32
Mark Cullen takes a shot. Save by James McKeown.36:42
Shot from just outside the box by Mark Cullen misses to the left of the target.35:51
Danny Whitehead takes a shot. Save made by James McKeown.34:58
The assistant referee flags for offside against Mark Cullen. Direct free kick taken by James McKeown.34:43
Danny Whitehead takes a shot. James McKeown makes a save.31:35
Andy Halls takes a shot. James McKeown makes a save.30:58
Alex Kenyon has an effort at goal from just outside the box which goes wide of the left-hand upright.28:34
Foul by Lee Bullock on James McKeown, free kick awarded. James McKeown restarts play with the free kick.28:02
Outswinging corner taken by Danny Whitehead, Ian Miller makes a clearance.27:45
Danny Schofield takes a shot. Save by James McKeown.27:27
Jon Macken takes a shot. Blocked by Ian Miller.26:57
Foul by Shaun Pearson on Jon Macken, free kick awarded. James Tunnicliffe takes the direct free kick.25:18
Free kick awarded for a foul by Danny Whitehead on Marcus Marshall. Free kick taken by Sam Hatton.24:36
Outswinging corner taken by Sean Newton, clearance made by Ian Miller.22:42
Jordan Fagbola concedes a free kick for a foul on Joe Colbeck. Joe Colbeck delivers the ball from the free kick right-footed from left wing, clearance made by James Tunnicliffe.17:55
Inswinging corner taken right-footed by Joe Colbeck, Andy Cook takes a shot. Save by Richard O'Donnell.14:20
Corner taken right-footed by Joe Colbeck. Joe Colbeck takes a corner.13:25
Free kick awarded for an unfair challenge on Andy Halls by Andy Cook. Richard O'Donnell takes the free kick.11:33
Alex Kenyon takes a shot. Save by James McKeown.10:31
Free kick awarded for a foul by Andy Halls on Marcus Marshall. Free kick taken by James McKeown.9:35
Free kick awarded for an unfair challenge on Jordan Fagbola by Andy Cook. Direct free kick taken by Richard O'Donnell.9:01
Jon Macken takes a shot. Save by James McKeown.6:55
Unfair challenge on Ian Miller by Mark Cullen results in a free kick. James McKeown takes the free kick.5:00
Joe Colbeck takes a shot from just inside the penalty box which clears the crossbar.4:26
Joe Colbeck decides to take the corner short.3:18
Ross Hannah produces a right-footed shot from long range which goes wide right of the target.1:46
Mark Cullen is ruled offside. James McKeown takes the direct free kick.0:00
The referee gets the game underway.
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