The 2012 Chicago Cubs are absolutely terrible, so they rely on their closer less than most. They're still supposed to have a closer, though, and as of the beginning of May, that closer was no longer Carlos Marmol. Marmol had struggled too much, and the Cubs had things they wanted him to work on.

Marmol evidently did enough, because Friday, he's back in the saddle. Carrie Muskat:

The Cubs needed to stabilize the bullpen and have decided Carlos Marmol is back as the closer.
[...]
“We told [Marmol] he’s done everything we’ve asked him to do and his side sessions and his work and he’s been throwing his fastball more,” Sveum said.

As a non-closer, Marmol threw nine innings, walking nine and striking out 12. Not necessarily effective numbers, but certainly not dull numbers. Rafael Dolis, Shawn Camp, and James Russell have all recorded at least one save this year, but now we're back to Marmol and oh man are we still talking about who's closing for the Chicago Cubs?

Friday, Marmol was handed a three-run lead against the Red Sox in the ninth. He allowed a hit, he surrendered a walk, and he kept the Red Sox off the board. Mission not not accomplished.