Cubs: They are interested in Curtis Granderson but will not trade Castro, Cashner or Marmol but maybe Vitters. The Cubs have about 3 more days to sign John Grabow before he hits the market on Friday (deal around 2 years and 7 million). There is also mile interest in CF Mike Cameron and OF Marlon Byrd.
Cardinals: There is a report out there that the top 3 teams to sign Matt Holliday are the Yankees (not first choice), Red Sox and the Angels but not the Cardinals. They are also interested in re-signing John Smoltz. They are also interested in outfielder Xaiver Nady.
Brewers: They already made a trade this year by trading SS JJ Hardy to the Twins for CF Carlos Gomez, they most likely won't re-sign Mike Cameron with the addition of Gomez. They decline the option on P Braden Looper and are also talking to the Tigers about 2009 all-star Edwin Jackson.
Astros: They would still bring back Miguel Tejada but to play 3B. They are interested in John Smoltz along with the Cardinals and are interested in Billy Wagner. They could bring back soon to be free agent closer Jose Valverde.
Pirates: They made a big splash to the start of the offseason by acquiring 2B Akinormi Iwanura from the Rays for relief pitcher Jesse Chavez. There payroll is still low but might be able too add 1 or 2 low cost free agents. The Pirates are expected to shop Ryan Doumit and closer Matt Capps this winter.
Reds: Reds declined the option on catcher Ramon Hernandez option but re-signed him a couple days ago to a 1 year contract. The Reds want to cut payroll with players like Aaron Harang, Bronson Arroyo and Brandon Phillips being traded.
That is pretty much the latest from the NL Central and I will always keep you posted on everything Cubs.