Barnsley made sure it was a happy return to Oldham for manager Lee Johnson as they triumphed 3-1 in an at-times fiercely-contested Roses clash.
Defender Lewin Nyatanga bagged a brace for the Reds as they zoomed menacingly into the Sky Bet League One play-off places thanks to a sixth straight victory - a feat not enjoyed by the Oakwell outfit since 1980 when Norman Hunter was in charge.
The one ever-so-slight negative for the Reds came when Mike Jones scored just before half-time for Oldham - the first time the rampant Reds had conceded a goal in 498 minutes of football.
After leading through Nyatanga and Conor Hourihane’s fluky first-half strike, the Reds seemingly clinched victory when they made it 3-1 after 71 minutes.
And it was Nyatanga who were in the right place again as he poked home from close range after George Waring’s header from a Hourihane free-kick bounced out off a post.
The two-goal deficit knocked the stuffing out of Oldham in the closing 10 minutes.
The Reds were coasting and Hourihane almost added a fourth when his 25-yard drive fizzed inches over the top.
At the other end, Oldham fluffed a terrific late chance from Rhys Murphy, while Adam Davies tipped Jonathan Forte’s header onto the top of the crossbar.
Oldham’s miserable day was summed up in stoppage-time when defender Adam Lockwood was sent off after being shown a second yellow card. Oldham (4-4-2): Kean; Brown, Lockwood, Kusunga, Sadler; Winchester, Woodland, Jones, Forte; Wilkinson, Philliskirk.Subs: Coleman, Dieng, Mellor, Turner, Bove, Jacobs, Murphy.
Barnsley (4-4-1-1): Davies; Holgate, Cranie, Nyatanga, John; O’Sullivan, Pearson, Scowen, Lalkovic; Hourihane; Waring. Subs: Dibble, Ibehre, Winnall, Bailey, Smith, M’voto, Jennings.
Referee: Mark Heywood (West Yorkshire).