Barnsley suffered a painful 1-0 home defeat to Yorkshire rivals Hull City at Oakwell on Saturday.
The Reds had the better chances for the majority of an uninspiring match but visiting substitute Fraizer Campbell won it for Hull in the 79th minute, before which his side did not have a shot.
With prospective new owner Chien Lee watching from the directors' box next to current owner Patrick Cryne, Barnsley remain 19th in the Championship with 12 points from as many games.
Paul Heckingbottom, who watched from the stands as he completed his two-game touchline ban, switched from 4-1-4-1 to 4-4-2 and made two changes to the side that drew 2-2 with Middlesbrough seven days earlier.
Jason McCarthy returned from suspension to replace Matty Pearson, who was dropped from the squad, with Ike Ugbo coming in for Brad Potts, who did not start a league game for the first time since signing.
The first half was very quiet with no shots on target from either side and, although Barnsley were the more positive and lively side, Hull did not look like the league's top-scorers as they had no shots at all and barely any attacks.
Barnsley's Harvey Barnes and Tom Bradshaw had long-range efforts which both went well over the bar then Bradshaw came closer when he headed wide from a cross by Adam Hammill who had run 40 yards into the Hull half after Liam Lindsay won the ball impressively.
Hammill then ballooned two shots well over either side of a Cameron McGeehan effort which was a lot closer as it went just inches over the Hull bar.
The first shots on target came ten minutes into the second half as Adam Hammill's low 25-yarder was touched just wide by Hull goalkeeper Alan McGregor. After the collecting the ball from the resulting corner, McGeehan drove into the box from the right wing and squared for Lindsay whose shot took a deflection then hit McGregor on the line and stayed out.
Ugbo then fired just wide of the right post from outside the box after cutting in from the left wing then Barnes fired over from closer in on the left after brilliantly jinking past a defender.
The match then quietened down again before Hull, who had not had a shot, opened the scoring with ten minutes left. Substitute Jackson Irvine saw his header from a corner cleared off the line by Joe Williams but another substitute Campbell tapped in from a couple of yards out. Adam Jackson had come off injured minutes earlier to be replaced by Angus MacDonald who was powerless to stop the goal.
Bradshaw looked certain to level five minutes later when a Hammill left-wing cross fell to him in the six-yard box but his effort was blocked by McGregor then Hull scrambled the ball away.
Barnsley goalkeeper Adam Davies made his first save of the match when he dived to his left to save a Michael Hector header from another Larsson corner.
Home substitute Ryan Hedges came close to a leveller in injury-time when his powerful low shot from the right corner of the box was diverted behind by McGregor's legs.
