Rosario, a 21-year-old right-hander, spent the 2011 season at Class A. He started 14 games and worked out of the bullpen for a 4.32 ERA with 7.3 K/9 and 4.0 BB/9.

Herrera, a 26-year-old, left-hander, has a 3.94 ERA with 6.3 K/9 and 3.3 BB/9 in 93 2/3 innings of work for the Reds and Brewers in his four-year MLB career. He spent most of the 2011 season at Triple-A, where he posted a 2.20 ERA with 7.9 K/9 and 2.2 BB/9 in 61 1/3 innings.

MLB.com's Adam McCalvy first reported the deal (on Twitter).

• In the wake of the Einhorn non-deal, the team may now try to sell ten ownership shares for $20MM each to match the $200MM they were expected to receive from Einhorn, report Gregory Zuckerman, Matthew Futterman, and Brian Costa of The Wall Street Journal.
• GM Sandy Alderson indicated to Adam Rubin of ESPN New York that the team's payroll will go down next year. "[The] fact is, even at $100 million or $110 million, we're still in the upper echelon of payrolls," said Alderson. The Mets started the year with a payroll of about $140MM.
• Rubin reports (via Twitter) that lefty reliever Danny Ray  Herrera was on the list of players the team chose from to complete the Francisco Rodriguez trade. The Mets have two players to be named later coming from the Brewers, though the identities of both are still unknown.
• "If there's something like that out there, that would be great," said Chris Capuano to Rubin when asked about signing a multi-year deal as a starting pitcher after the season. "If it's a one-year deal or something, at this point in my career I'm excited to have the opportunity to go out there as a starting pitcher. I’m not as concerned with the contracts and everything else. As long as I have an option next year to start, I"ll be happy." Capuano has a 4.38 ERA in 26 starts this year.

• The Brewers outrighted Danny Ray Herrera to Triple-A Nashville, according to MLB.com's transactions page. They designated the left-hander for assignment on Saturday.
• Marlins catcher Brad Davis, designated for assignment Wednesday to open a 40-man spot for Jose Lopez, is headed to New Orleans according to the team's Twitter account.

Herrera, 26, pitched both yesterday and today. He gave up a homerun to Kosuke Fukudome and recorded two outs yesterday, and tonight he gave up four runs in an inning of work against the Red Sox. Herrera was claimed off waivers from the Reds just a few weeks ago, and the lefty's big league career consisted of a 3.69 ERA with 6.4 K/9 and 3.2 BB/9 in 92 2/3 innings coming into today.

The 26-year-old Herrera came to the Reds from the Rangers in December of 2007 along with Edinson Volquez for Josh Hamilton.  Herrera logged 92 big league innings from 2008-10, posting a 3.62 ERA, 6.5 K/9, 3.2 BB/9, and 0.8 HR/9.  Against southpaws, he has a 7.2 K/9, 2.7 BB/9, and 0.41 HR/9 in 44 career innings.  He's the definition of a soft-tosser, with an average fastball in the 83-84 mile per hour range.  Herrera's out pitch is a screwball, as ESPN's Tim Kurkjian explained in this article a couple of years ago.

The Brewers are the only contender currently without a left-handed reliever on the active roster.  Zach Braddock, Manny Parra, and Mitch Stetter are all on the DL.

You all know the story with Hamilton.  Former first overall pick by the Rays in ’99, immensely talented.  Derailed by drug problems for many years, then posted an incredible half season in the Majors for the Reds despite little experience above A ball.  He put up a .922 OPS for the Reds, and seems like a great gamble by Jon Daniels despite health concerns.  He’ll turn 27 in May; hopefully the Rangers let him stay in center.  Hamilton leaves a park that inflates left-handed home runs by about 28% to a park that inflates them by 24%.  His departure clears a path for top prospect Jay Bruce.

Volquez, 24, is also immensely talented.  He kept stalling at the big league level but finally seemed to figure it out in September.  Baseball America calls his stuff "electric," describing a mid-90s heater paired with a mid-70s change-up.   One concern here is that Volquez is a flyball pitcher.  Wayne Krivsky took an interesting route to add an intriguing starter; I wonder if the move takes them out of the Erik Bedard sweepstakes.  It’s been speculated that the Reds could go after Mike Cameron to fill their new center field void.

Herrera, 23, is a southpaw relief prospect.  Check out this info from Baseball America.  He barely registers 5-foot-7, 145 pounds.  He tops out at 84mph but throws some kind of screwball to offset the weak heat.  This trick helped him post an 11.0 K/9 in Double A this year.

Baseball America rocks, check them out by the way.  They’ve already got analysis of this deal up here.