We learned a few days ago that Dan Kolb didn't make the Pirates roster. That came as a bit of a surprise: he does have super-veteran-closer mojo, and it's not like the Pirates are exactly stacked in the bullpen department.
Then again, Kolb hasn't been any good for the last two years.
I would imagine that Kolb looked around for a team that might put him on their major league roster, but then he realized his best shot was with the cellar-dwelling Pirates, so he has accepted an assignment to triple-A. Unfortunately, the Pirates AAA club (Indianapolis) isn't in the same league as Nashville, so we won't be able to keep track of how many home runs Vinny Rottino and Ryan Braun hit off of Kolb.
The player more like Capellan is Jorge Cantu, only one year removed from lots and lots of RBIs, but demoted by the Devil Rays. Cantu wasn't any good last year, and was caught in a roster squeeze with the likes of B.J. Upton, Akinori Iwamura, and Ty Wigginton. Initially, he reacted the same way Capellan did--and he has reiterated his trade request--but he's headed the minors, too.
Incidentally, Capellan for Cantu wouldn't be a horrible trade. It's about even, talent-wise: both players have (had?) high upsides that haven't turned into much, but both are still young enough for something to go right. Cantu doesn't have an obvious home on the Brewers, though he has played some third base.
The biggest problem with Cantu is that he's a butcher in the field; if we're going to go with a guy like that, we might as well call up Ryan Braun, who is probably a better hitter than Cantu right now. If Cantu wasn't complaining about being in the minor leagues, I'd love to stash him as triple-A depth, but I'm guessing that's not the kind of trade he's looking for, and I'd be surprised if the Rays handed him off to yet another team he wouldn't be happy with.