Match ends, Rochdale 0, Barnsley 1.
Barnsley earned their first win in six games to defeat former boss Keith Hill and his high-flying Rochdale side.
Peter Ramage, in his first appearance for the Tykes since returning on loan from Crystal Palace, headed the only goal from Conor Hourihane's corner.
With the hosts looking for an equaliser, Ian Henderson volleyed wide and Peter Vincenti fired over.
And Dale needed Conrad Logan to saved Hourihane's stoppage-time penalty after Jack O'Connell fouled Devante Cole.
Rochdale assistant manager Chris Beech told BBC Radio Manchester:
"It was frustrating, but at the same time you know we weren't quite on our 'A' game.
"I felt there were goals in the game for us.
"It was up to us to be quicker on the ball at half time, we did pass it but we couldn't break through."
Barnsley manager Danny Wilson told BBC Radio Sheffield:
"I am pleased, I think you've seen a better reflection of who we are today.
"The last few games we've conceded too many goals and too many simple goals.
"I gave it a big of a re-jig today and the experience of Peter Ramage coming in was a big lift for us."
- 2RaffertySubstituted forHeryat 72'minutes
- 8LundSubstituted forAndrewat 55'minutes
- 7VincentiSubstituted forBunneyat 68'minutes
- 7TreacySubstituted forBrownat 60'minutes
- 8HourihaneBooked at 85mins
- 44ColeBooked at 29mins
- 9WinnallSubstituted forHemmingsat 80'minutes
- Kevin Wright
- Shots on Target
Second Half ends, Rochdale 0, Barnsley 1.
Delay in match Ross Turnbull (Barnsley) because of an injury.
Foul by Calvin Andrew (Rochdale).
(Barnsley) wins a free kick in the attacking half.
Jamie Allen (Rochdale) wins a free kick on the right wing.
Foul by Luke Berry (Barnsley).
Corner, Barnsley. Conceded by Jamie Allen.
Penalty saved! Conor Hourihane (Barnsley) fails to capitalise on this great opportunity, right footed shot saved in the top right corner.
Penalty Barnsley. Devante Cole draws a foul in the penalty area.
Penalty conceded by Oliver Lancashire (Rochdale) after a foul in the penalty area.
Ian Henderson (Rochdale) wins a free kick in the attacking half.
Foul by James Bailey (Barnsley).
Attempt missed. Luke Berry (Barnsley) right footed shot from outside the box misses to the right.
Corner, Barnsley. Conceded by Jack O'Connell.
Attempt blocked. James Bailey (Barnsley) right footed shot from outside the box is blocked.
Attempt missed. Ian Henderson (Rochdale) right footed shot from the centre of the box is high and wide to the right.
Stephen Dawson (Rochdale) wins a free kick on the left wing.
Foul by Devante Cole (Barnsley).
Attempt missed. Calvin Andrew (Rochdale) header from the centre of the box misses to the right.