I am from Chicago and I am also a season ticket holder to the White Sox.
Marte has no chance (with the usual disclaimers about "never say never") of closing this year. If anyone in your league is waiting on him or interested in him, dump him.
Takatsu has not only been good statistically, but he has looked dominant. No, he does not throw 95, but the guy is a freak. He has about 3-4 different "frisbees" he throws up there, can locate and can get it up to 88-89 when he needs to. I have been watching baseball for about 20 years and I can't remember a guy that looks as goofy as this...I have seen MLB hitters double clutch and look flat-out bad more against this guy than any other guy I can remember who didn't have filthy stuff.
I was not a believer early on, but this guy is a pro...and he is a very underrated fantasy play for at least the rest of this year.