Family.. If Kim want's to play in TO to be with Ryu, and his family, wife etc want to live, have kids go to school in SD/distance from Korea, large Korean community, family/wife almost always wins. I don't care if you are a pro baseball player or Joe Schmoe.. Wife says she wants to live somewhere and you say I want to hang with a buddy or want to hang in a lake house in the forest, (my case, and I don't live there) and your wife says no... The wife always wins.. So family wanting to be in SD, plus the MLB playing time guaranty.. Not such a mystery..