One thing I noticed while in Korea that I keep coming back to is that Koreans haven't really developed a collecting culture. There are hobbies, of course. It seems like outdoor activities are extremely popular, especially with older generations. Video games and card games are fairly common, though there isn't much of a retail base for those. And everybody goes to Lotte World on their day off.
When it comes to souvenirs, though, they just haven't taken hold. I found a mall with several stamp collecting stores on my prior trip, though I'm not sure how they survive. As far as sports goes, I'm surprised there are no big baseball CCGs and there were no cards at any of the stadium stores I visited.
Teleca released a few sets in the 1990s. Three sets similar to what you see in America were issued in 1999 and 2000, plus several team and smaller issues seem to have come scattered over the years. I believe I have singles from the 1999 and 2000 issues and a few of the other random prior issues, but with limited details I don't know how complete my Korean collection is.
I didn't find any normal cards on this trip. I came home with seven different uncut sheets, though!
I haven't done any research to try to discover any player names and an issue date, and I'm too busy these days to do so anyway. I'd be interested in compiling as extensive a list of Korean sets as possible for a post - I'm aware of most of the Teleca cards, of course, the 1995 sticker set, and the 2010 card game set. (I think SCF could really be improved by the addition of league information for each set.)
And yes, that's it. Perhaps a return to some of the stamp shops or similar shops in Korea might provide me with some additional sets, but it really does seem they have all disappeared. There aren't many paper-goods dealers at the flea markets I visited in Seoul.