One of those players, Shingo Takatsu, has made the rounds. He has played in the Major Leagues, the Japanese League, the Korean League, and the Chinese League (Taiwan). In doing so, he has achieved a unique honor:
Shingo Takatsu became the first pitcher to record saves in the NPB (286), MLB (27), KBO (8), and the CPBL (1) when he saved a game against the Brother Elephants on the 31st.By my count, that's 322 career saves. I don't care what league you pitch in, that's a lot of saves. For what they are worth.
This the only English-language account I can find, as everything else is in Chinese. I'm sure there's a lot more, but this achievement speaks for himself.