Why does Lotte keep using Kim Won-jung? lol

His skill level is that of a setup man
But every time he comes in as a closer, he sets the game on fire
Has there been no learning effect?
If they keep using Kim Won-jung as a closer, they won't make the postseason in the future either
This guy has never made the postseason since becoming a closer
It's heavily related to him; I'm saying he's a huge factor