Read Johnson, Atdhe Nuhiu, Connor Wickham and Chris Maguire had got the Owls 4-0 up and cruising against their Yorkshire rivals, before Caolan Lavery came on to bag a brace and add insult to injury.
We look back at the 14 players that featured at Hillsborough on this day in 2014, and asked the question – where are they now?
9. Chris Maguire
He got the fourth goal against Leeds, and went on to get seven more that season. He's currently at Sunderland in League One, and has got three goals in 17 games so far in 2020/21. Photo: Anna Gowthorpe
10. Connor Wickham
Wickham was on his second of three loans spells at Hillsborough for this one, but he never got more league goals in a campaign than he did in this season for Wednesday (8). He's now with Crystal Palace, but out of favour and out of contract at the end of the campaign. Photo: Anna Gowthorpe
11. Atdhe Nuhiu
Nuhiu left Wednesday at the end of last season after becoming just the second player this millennium to score 50 goals for the club. He's now at APOEL in Cyprus. Photo: Anna Gowthorpe
12. Caolan Lavery
He's currently in League Two with Walsall, and actually faced the Owls earlier this year in the Carabao Cup. He's got three goals this season for the club. Photo: Anna Gowthorpe