We've got our preview up for the various foreign Winter Leagues, with 19 players (and a couple coaches) representing the White Sox. There are major leaguers like Leury Garcia, prospects like Michael Ynoa and Omar Narvaez, and some org guys playing in the Caribbean. The article touches on the likely reasons why the various players are there.

 

I'd focus mostly on guys fighting for 40-man protection - Ynoa, Marin, Garcia and Rondon (though the last one is highly unlikely to be a Rule V risk).

 

When we did the preview, the PR and Aussie League rosters weren't out yet. They are now. No Sox down under this year, but one prospect (and ranked one at that) was added to a Puerto Rico team roster. Article at link in OP updated to reflect that.