Andy Bishop scored his seventh and eighth goals of the season as Bury earned a valuable victory at Oldham.
It started badly for Oldham, who had keeper Alex Cisak sent off after just 10 minutes for bringing down Bishop as the striker burst clear on goal.
Cisak's replacement - 38-year-old goalkeeping coach Paul Gerrard - saved the weak resulting penalty from Bishop.
Bishop made amends by first volleying home from six yards before his close-range header sealed the victory.
The visitors were also reduced to 10 men in injury time when Lenell John-Lewis received his second yellow card.
VIEWS FROM THE DRESSING ROOM
Oldham Athletic manager Paul Dickov told BBC Radio Manchester:
"I'm delighted and proud of the effort the 10 men put in for 79 minutes.
"It was a sending off. Alex has been fantastic for us but his starting position has to be better there and you're up against it.
"We've lost 2-0 against one of our local rivals but I'm proud of my players, which doesn't feel right."
Bury manager Richie Barker told BBC Radio Manchester:
"I thought in terms of our performance, the second half was nowhere near good enough.
"But after saying that at 2.55 would we have taken a 2-0 win over Oldham? Of course we would.
"I think Bish (Andy Bishop) has learnt to adapt his game and I'm sure he's a cleverer striker than he was three or four years ago."
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Live Text Commentary
Full Time The game is over, as the referee blows his whistle.90:00 +3:32
Shaun Harrad takes a shot. Save by Paul Gerrard.90:00 +1:36 Dismissal
Dismissal Lenell John-Lewis receives a red card for second bookable offence.90:00 +0:28
Outswinging corner taken left-footed by Peter Sweeney from the left by-line, Andy Bishop concedes a free kick for a foul on Nathan Clarke. Paul Gerrard restarts play with the free kick.88:27
Lenell John-Lewis is flagged offside by the assistant referee. Direct free kick taken by Dean Furman.87:54
Inswinging corner taken by David Mellor from the right by-line, Steven Schumacher makes a clearance.87:31
Matt Smith takes a shot. Mark Hughes gets a block in.85:34
Kieran Lee crosses the ball.84:27
Dean Furman challenges Lenell John-Lewis unfairly and gives away a free kick. Direct effort from the free kick comes in from Steven Schumacher, Paul Gerrard makes a save.83:37
Phil Picken fouled by Chris Taylor, the ref awards a free kick. The free kick is swung in left-footed by Peter Sweeney, clearance by Zander Diamond.82:04
Foul by Peter Sweeney on Chris Taylor, free kick awarded. David Mellor shoots direct from the free kick.81:35
The ball is swung over by Robbie Simpson, Peter Sweeney makes a clearance.81:03
Free kick awarded for an unfair challenge on Matt Smith by Mark Hughes. David Mellor takes the free kick.80:36
Shane Byrne takes a shot. Zander Diamond gets a block in.79:13 Substitution
Substitution Shaun Harrad is brought on as a substitute for Mike Jones.79:13
Chris Taylor has an effort at goal from the edge of the area that misses to the right of the target.78:19
Headed effort from inside the area by Lenell John-Lewis misses to the right of the goal.77:23
Corner taken left-footed by David Mellor, Chris Taylor takes a shot. Cameron Belford makes a comfortable save.76:28 Booking
Booking Mike Jones is shown a yellow card.76:18
Mike Jones challenges David Mellor unfairly and gives away a free kick. Robbie Simpson restarts play with the free kick.
The ball is delivered by Dean Furman, Joe Skarz manages to make a clearance.73:11
Corner taken by David Mellor, clearance by Ashley Eastham.72:28
Corner taken by David Mellor played to the near post, clearance made by Lenell John-Lewis.72:08
Shefki Kuqi takes a shot. Save by Cameron Belford.70:35
Andy Bishop gives away a free kick for an unfair challenge on Nathan Clarke. David Mellor takes the free kick.70:16
The ball is sent over by David Mellor, clearance made by Steven Schumacher.69:21
The assistant referee signals for offside against Nathan Clarke. Cameron Belford takes the indirect free kick.68:39 Booking
Booking Lenell John-Lewis is shown a yellow card.68:26
Free kick awarded for a foul by Lenell John-Lewis on Kieran Lee. Indirect free kick taken by Dean Furman.67:38 Substitution
Substitution Matt Smith joins the action as a substitute, replacing Tom Adeyemi.67:31
A cross is delivered by Andy Bishop.64:57
Andy Bishop is ruled offside. Dean Furman takes the direct free kick.61:12
Free kick awarded for a foul by Chris Taylor on Peter Sweeney. Indirect free kick taken by Phil Picken.59:45
Effort on goal by Shefki Kuqi from deep inside the penalty area misses to the right of the goal.58:40
Shot on goal by Shefki Kuqi from inside the box goes harmlessly over the target.57:04
Steven Schumacher takes a inswinging corner from the left by-line played to the near post, Peter Sweeney produces a left-footed shot from outside the penalty area and misses left.56:48
The ball is crossed by Phil Picken, Zander Diamond manages to make a clearance.53:45
Robbie Simpson is flagged offside by the assistant referee. Cameron Belford restarts play with the free kick.52:35
Robbie Simpson fouled by Steven Schumacher, the ref awards a free kick. David Mellor takes the indirect free kick.50:15
Phil Picken challenges Robbie Simpson unfairly and gives away a free kick. Free kick taken by Paul Gerrard.48:58
Steven Schumacher has an effort at goal from outside the box which goes wide left of the target.47:17
The ball is sent over by David Mellor, clearance made by Ashley Eastham.47:04
Robbie Simpson delivers the ball, clearance made by Phil Picken.45:31
Steven Schumacher is penalised for handball and concedes a free kick. Indirect free kick taken by Robbie Simpson.45:01
The second half has started.45:00 +2:07 Half time
Half Time The half-time whistle blows.45:00 +1:41
The ball is delivered by Chris Taylor, Ashley Eastham makes a clearance.45:00 +0:41
Outswinging corner taken by Peter Sweeney from the right by-line.45:00 +0:22
Mike Jones takes a shot. Zander Diamond gets a block in.44:09
Free kick awarded for an unfair challenge on Robbie Simpson by Steven Schumacher. Indirect free kick taken by Robbie Simpson.43:39
Phil Picken crosses the ball, save made by Paul Gerrard.40:16
The referee blows for offside against Zander Diamond. Cameron Belford restarts play with the free kick.38:59
Foul by Lenell John-Lewis on Dean Furman, free kick awarded. Indirect free kick taken by Nathan Clarke.37:08
Andy Bishop is flagged offside by the assistant referee. Free kick taken by Paul Gerrard.36:56
Phil Picken produces a cross.36:46
A cross is delivered by Lenell John-Lewis, clearance made by Nathan Clarke.35:34
The referee penalises Robbie Simpson for handball. Cameron Belford restarts play with the free kick.33:14 Booking
Booking Booking for Dean Furman.32:59
Free kick awarded for an unfair challenge on Mike Jones by Dean Furman. Free kick taken by Steven Schumacher.32:22
The ball is crossed by Ashley Eastham, clearance by Zander Diamond.31:03 Booking
Booking Steven Schumacher receives a yellow card.30:55
Unfair challenge on Tom Adeyemi by Steven Schumacher results in a free kick. Indirect free kick taken by Paul Gerrard.29:39
Assist by Peter Sweeney.29:39 Goal scored
Goal! - Andy Bishop - Oldham 0 - 2 Bury Andy Bishop scores a headed goal from inside the penalty area. Oldham 0-2 Bury.29:08
Inswinging corner taken by Peter Sweeney from the right by-line,24:01
Foul by Lenell John-Lewis on David Mellor, free kick awarded. Paul Gerrard takes the indirect free kick.23:06
Unfair challenge on Chris Taylor by Phil Picken results in a free kick. Nathan Clarke takes the free kick.21:03
Assist on the goal came from Lenell John-Lewis.21:03 Goal scored
Goal! - Andy Bishop - Oldham 0 - 1 Bury Andy Bishop gets on the score sheet with a goal from inside the six-yard box to the bottom right corner of the goal. Oldham 0-1 Bury.20:03
The ball is swung over by Mike Jones, save made by Paul Gerrard.18:38
Joe Skarz produces a cross, Headed effort from inside the box by Andy Bishop misses to the right of the target.17:24
A cross is delivered by Phil Picken.14:46
Phil Picken challenges Robbie Simpson unfairly and gives away a free kick. Direct effort from the free kick comes in from Robbie Simpson.14:23
Shefki Kuqi takes a shot. Save by Cameron Belford.14:08
The ball is swung over by Robbie Simpson, clearance by Mark Hughes.11:51 Penalty
Goalkeeper makes the save from the spot kick. Oldham 0-0 Bury.9:31 Substitution
Substitution Paul Gerrard on for Luca Scapuzzi.9:31 Dismissal
Dismissal Alex Cisak shown a red card.9:07
Alex Cisak challenges Andy Bishop unfairly and gives away a Penalty.8:19
Luca Scapuzzi produces a right-footed shot from the edge of the box and misses to the left of the target.7:23
Unfair challenge on Zander Diamond by Andy Bishop results in a free kick. Free kick taken by Nathan Clarke.2:00
The ball is swung over by Mike Jones, clearance made by Alex Cisak.0:27
Inswinging corner taken by Steven Schumacher from the left by-line, clearance by Shefki Kuqi.0:17
Peter Sweeney sends in a cross.0:00
The referee gets the match started.
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