Three goals in the last 20 minutes from Matt Carbon, Nathan Jarman and Mark Stallard gave an experienced Barnsley Reserves victory over their Owls rivals at Stocksbridge.
Drew Talbot gave the Owls a first half lead.
Barnsley Line-Up: Colgan, Austin, Williams, Tonge, Carbon (Atkinson 78), Laight, Wroe, Heslop, Onibuje (Jarman 65), Stallard, Baker.
Reserves result: Sheffield Wednesday 1 Barnsley 3
Unused subs: Scarsella, Joynes, Harban.