The KBO or Korea Baseball Organization boasts the nation's hottest professional sports league.
It's now down to the final showdown.
A very familiar face was at the opening game of the Korean series.
President Moon Jae-in threw out the first pitch at the seven-game series opener between the Kia Tigers and the Doosan Bears.
The liberal leader was fulfilling a pledge he made during his election campaign last spring.
At the time, he asked voters to take a picture after they voted and upload it to his website with their favorite baseball team in the description.
The team with the most pictures would have the president showing up to throw the opening pitch at the home field.
That turned out to be the Kia Tigers.
Their home turf: Gwangju-Kia Champions field in Gwangju south of Seoul.