Match ends, Barnsley 2, Stoke City 4.
Michael O'Neill got off to the perfect start as Stoke City manager despite limited preparation time as they beat moved off the bottom of the Championship at the expense of Barnsley.
O'Neill only finalised a deal to take charge of the Potters on Friday after he was given permission to relinquish his full-time job as Northern Ireland boss.
"It's a great start," he told BBC Radio Stoke. "I'm delighted with the result because where we are at this moment in time, that's the key thing.
"But many aspects of the performance were very, very pleasing. We've obviously had very little time to work with the players.
"So we had to make a decision to change the system and make some changes in personnel without seeing the players in any great detail, but the response we got was excellent."
Despite Stoke having had just the one training session under O'Neill, Sam Clucas got the new era off to a great start with an early goal.
He punished a poorly struck free-kick taken by Barnsley keeper Bradley Collins more than 40 yards from goal, which clumsily cannoned into Clucas.
After coolly controlling with a neat first touch, Clucas launched, from close to the halfway line. a stunning 60-yard left-foot chip into the now unguarded empty net.
Lee Gregory then converted a rare successful Stoke penalty to double the lead before half-time after James McClean was brought down by Alex Mowatt.
Barnsley did reduce the deficit early in the second half when Cameron McGeehan pounced on a Luke Thomas through ball from close range.
But Joe Allen restored the Potters' two-goal lead when he fired in low after a corner was not cleared and then Clucas was on target again with a 25-yard left-foot screamer for his second.
Patrick Schmidt netted a Barnsley consolation when he slotted in Mowatt's superb long ball over the top, but the Tykes remain winless since the opening day of the season.
Stoke's victory was their biggest in the league since winning 6-1 at home to Brendan Rodgers' Liverpool on the final day of the 2014-15 season, the first time they have hit four goals in a league game since the 4-3 win over Everton at Goodison in December 2015 - and the first time they had scored more than two in a game since the 3-1 home win against Alan Pardew's West Brom in December 2017.
Potters need more 'composure'
O'Neill revealed there was "a temptation" for him to watch from the stands at Oakwell and allow caretaker manager Rory Delap to continue taking care of the team.
But after a short training session on Friday, he decided to implement the required changes for himself.
They included giving the fit-again Gregory the nod up front ahead of Sam Vokes and recalling McClean, Tom Ince, Ryan Woods and Bruno Martins Indi in a switch to 4-3-3 formation from the 5-3-2 used in Monday's home defeat by West Bromwich Albion.
"We needed to get a reaction with energy at the top end of the pitch and I felt we played players in the right positions," said O'Neill. "That obviously gives them confidence, but it was only a first step. In terms of how we play in that system, we'll get better.
"It was probably entertaining to watch, but it was a bit like a basketball game at times. We don't need to try and win 6-1 when we're already 4-1 ahead. We need to show a bit more composure."
'Barnsley boss will have real big challenge'
Stoke's victory ended a run of three defeats either side of Nathan Jones' departure as manager - and was just their third league win this season.
Barnsley, who have been under the caretaker charge of Adam Murray since parting company with Daniel Stendel on 8 October, are now two points adrift at the bottom, without a win in 15 league games.
Murray told BBC Radio Sheffield that turning the Tykes' fortunes around will be difficult.
"The board have got a big decision to make over the international break as whoever gets this job permanently has got a real big challenge on their hands," he said.
"The goals we've conceded are errors that we keep saying can't happen. You can work as much as you want on tactics and shape but, if we keep making bad decisions like that, it'll be a long season.
"People have got to start taking responsibility and ownership as it's happening week in, week out. It's up to them to start addressing it.
"The goals we're conceding are not great goals and we don't get the same chances that the opposition are presented with by us."
- 24HalmeBooked at 45mins
- 21SibbickSubstituted forThomasat 45'minutes
- 12CavaréBooked at 65mins
- 8McGeehanBooked at 52minsSubstituted forWilksat 75'minutes
- 9WoodrowBooked at 84mins
- 11ChaplinSubstituted forSchmidtat 82'minutes
- 28Simoes Inacio
- 6BatthBooked at 59mins
- 15Martins Indi
- 22ClucasSubstituted forB Ndiayeat 73'minutes
- 7InceSubstituted forDioufat 82'minutes
- 19GregorySubstituted forVokesat 90'minutes
- 27B Ndiaye
- Jeremy Simpson
- Shots on Target
Second Half ends, Barnsley 2, Stoke City 4.
Corner, Barnsley. Conceded by Ryan Woods.
Attempt saved. Cauley Woodrow (Barnsley) right footed shot from outside the box is saved in the centre of the goal. Assisted by Luke Thomas.
Substitution, Stoke City. Sam Vokes replaces Lee Gregory.
Foul by Mallik Wilks (Barnsley).
Bruno Martins Indi (Stoke City) wins a free kick in the defensive half.
Corner, Barnsley. Conceded by Badou Ndiaye.
Corner, Stoke City. Conceded by Kenneth Dougall.
Attempt missed. Alex Mowatt (Barnsley) left footed shot from outside the box is close, but misses to the right.
Corner, Stoke City. Conceded by Dimitri Kevin Cavaré.
Foul by Patrick Schmidt (Barnsley).
Danny Batth (Stoke City) wins a free kick in the defensive half.
Goal! Barnsley 2, Stoke City 4. Patrick Schmidt (Barnsley) right footed shot from the centre of the box to the bottom left corner. Assisted by Alex Mowatt.
Substitution, Barnsley. Patrick Schmidt replaces Conor Chaplin.
Substitution, Stoke City. Mame Biram Diouf replaces Tom Ince.
Attempt missed. Cauley Woodrow (Barnsley) right footed shot from outside the box is high and wide to the right. Assisted by Mallik Wilks with a headed pass.
Attempt blocked. Alex Mowatt (Barnsley) left footed shot from the left side of the box is blocked. Assisted by Conor Chaplin.
Substitution, Barnsley. Mallik Wilks replaces Cameron McGeehan.
Substitution, Stoke City. Badou Ndiaye replaces Sam Clucas because of an injury.