McKay, who was a 19th-minute substitute for the injured Park Yong-Ho, netted the winner deep into stoppage time to all but confirm Busan's top-eight aspirations ahead of the split.

The Gangwon keeper couldn't hold a low cross from the left which spilled to McKay almost on the penalty spot and he produced an emphatic first-time finish to decide the game.

Seung-Hwan Bang gave the visitors the lead on 10 minutes before Weslley found a reply for Gangwon shortly after half-time.

Elsewhere, Suwon Bluewings climbed to third in the K-League standings after stunning league leaders Seoul, while Ulsan lost to Incheon United.

Suwon took the lead at the Seoul World Cup stadium thanks to a Dzenan Radonic penalty in the ninth minute and sealed victory when the Montenegrin striker completed his brace eight minutes from full-time.

The result was just the fourth defeat of Seoul's league campaign.

Suwon usurped Ulsan in the league table after Incheon stunned Kim Ho-Gun's side 1-0 at Big Crown stadium.

Ki-Hyeon Seol scored the winner for the visitors in the eighth minute.

Daejon Citizen completed a day of victories for travelling teams, as first-half goals from Dong-Hee Kim and Alex Terra set up a 2-1 win at Gwangju's Guus Hiddink Stadium.

Gi-Dong Park pulled one back for the hosts in the 63rd minute but Daejon held on to move in to 13th place on the table.