THE Reds marched into the play-off places with their sixth win on the bounce on Saturday.
Barnsley boss Lee Johnson, who made a winning return to former club Oldham, watched his side triumph 3-1 with goals from Conor Hourihane and a Lewin Nyatanga brace.
The defender, who broke the deadlock just after the half-hour mark, hit home from close range to put the visitors ahead.
Hourihane, who was in the right place at the right time in another goalmouth scramble six minutes later, grabbed his 13th of the season when an attempted clearance ricocheted in off the unaware playmaker to double the Reds' lead.
Mike Jones halved Oldham's deficit before half-time with a well-taken shot but Nyatanga was on hand once again to secure Barnsley's sixth consecutive win to put his side into the final play-off place.
Johnson said: "We've been professional, scored a couple from set pieces and won the game which is what we came to do.
"If you're going to be successful you need to share the goals around the team and it was great for Lewin to get two goals."
Next up for the Reds is a trip to relegation-threatened Leyton Orient on Tuesday night.