Lys Mousset also scored in Sheffield United's 2-1 win over Stoke last weekend
Lys Mousset scored twice in two minutes as Sheffield United held off a Barnsley fightback at Oakwell to inflict the Tykes' sixth successive Championship defeat.
Following a dreary opening half, the Frenchman broke the deadlock by curling a right-footed shot beyond Brad Collins and then doubled the lead by converting Ben Osborn's low cross.
Jasper Moon hit the post for the Tykes, without a win in their 11 previous games, before Osborn seemingly put the match out of their reach by adding United's third.
Substitute Devante Cole scored Barnsley's first second-half goal since the opening day of the season and Aaron Leya Iseka pulled another back with eight minutes remaining, but they could not find an equaliser and head coach Markus Schopp's position looks precarious with his team next to bottom of the table.
United, meanwhile, climbed four places to 14th, pending the outcome of Sunday's later game between Fulham and Nottingham Forest.
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Both sides made four changes, with Oli McBurnie starting up front for the Blades - having scored against them in Barnsley's 3-2 home win in April 2018, the most recent meeting between the south Yorkshire clubs.
However, there was little quality shown by either side in the opening 45 minutes which saw just one effort on target each and neither keeper seriously tested.
Markus Schopp inherited a Barnsley team that finished fifth last season when he arrived in the summer
Cauley Woodrow forced a low save from United goalkeeper Robin Olsen soon after the re-start, but the home side were stunned by Mousset's quickfire double.
He was replaced just after the hour mark as Slavisa Jokanovic sent on Billy Sharp and David McGoldrick as substitutes, with 194 Championship goals between them.
Sharp headed too high with his first opportunity, but Osborn found the bottom corner to extend the lead, leaving Barnsley with no option but to throw caution to the wind.
Cole - whose previous goal for Barnsley came during a 2014 loan spell - volleyed home after missing an easier chance when the score was 2-0 and Leya Iseka grabbed his first goal in English football with a left-footed shot after powering between two defenders.
It was, though, not quite enough for the Tykes and they are only above Wayne Rooney's Derby, who had 12 points deducted in September for going into administration.
- Line-upsMatch StatsLive Text
- 40Collins20Sibbick30Helik5KitchingSubstituted forHondermarckat 74'minutes7Brittain17Gomes15Moon4Styles29AdeboyejoSubstituted forColeat 59'minutes9Woodrow28FrieserSubstituted forLeya Isekaat 54'minutes
- 1Walton11Leya Iseka22Oduor23Hondermarck26Vita44Cole58Oularé
- 1Olsen2Baldock12Egan22Davies3StevensBooked at 56mins16Norwood4Fleck29NdiayeSubstituted forMcGoldrickat 67'minutes9McBurnieSubstituted forBashamat 86'minutes23Osborn11MoussetBooked at 52minsSubstituted forSharpat 61'minutes
Referee:Gavin WardAttendance:15,720Match StatsHome TeamBarnsleyAway TeamSheff UtdPossessionHome39%Away61%ShotsHome11Away7Shots on TargetHome4Away4CornersHome5Away2FoulsHome6Away15Live TextPost update
Match ends, Barnsley 2, Sheffield United 3.
Second Half ends, Barnsley 2, Sheffield United 3.
Attempt missed. Jasper Moon (Barnsley) header from the centre of the box misses to the left. Assisted by Cauley Woodrow with a cross following a corner.
Corner, Barnsley. Conceded by Enda Stevens.
Foul by John Fleck (Sheffield United).
Callum Brittain (Barnsley) wins a free kick in the attacking half.
Substitution, Sheffield United. Chris Basham replaces Oliver McBurnie.
Foul by David McGoldrick (Sheffield United).
Callum Styles (Barnsley) wins a free kick on the left wing.
Foul by Billy Sharp (Sheffield United).
Toby Sibbick (Barnsley) wins a free kick in the defensive half.
Goal! Barnsley 2, Sheffield United 3. Aaron Leya Iseka (Barnsley) left footed shot from the centre of the box to the top left corner.
Foul by John Fleck (Sheffield United).
Claudio Gomes (Barnsley) wins a free kick in the defensive half.
Goal! Barnsley 1, Sheffield United 3. Devante Cole (Barnsley) left footed shot from the centre of the box to the top right corner. Assisted by Cauley Woodrow.
Attempt blocked. Aaron Leya Iseka (Barnsley) right footed shot from outside the box is blocked. Assisted by Devante Cole.
Corner, Barnsley. Conceded by Ben Davies.
Foul by Oliver McBurnie (Sheffield United).
Claudio Gomes (Barnsley) wins a free kick in the attacking half.
Substitution, Barnsley. William Hondermarck replaces Liam Kitching.
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