Cubs first baseman Carlos Pena "will almost surely be moved," tweets SI's Jon Heyman. Heyman adds that the Diamondbacks "could be in play there."
There is the possibility that the Cubs want to re-sign Pena for 2012, but otherwise trading him now would be wise. Typically trading a player at the deadline clears a third of his salary, but as I mentioned earlier this month, the Cubs could clear two-thirds of Pena's due to the structure of his contract. I've noted that the Pirates and Diamondbacks might be the only contenders in need of a first baseman, so even though the market for bats overall is weak, those teams have leverage. The 33-year-old Pena is hitting .221/.334/.445 with 20 home runs in 378 plate appearances this year for the Cubs.