Well, Heilman has been very good, but I really doubt the Cubs will trade him since they really like him. I'm sure other teams would want Gregg, but wouldn't want to pay the price the Cubs would demand, nor would the Cubs be interested in trading him. Cotts probably can't be traded at this point at any price for self explanatory reasons, although if it was later in the season it wouldn't be unbelievably shocking to see another team take him on for cash. Vizcaino has been very good so far. If the Cubs were willing to eat part of his contract, somebody might be interested now that they see that he's pitching a little bit better. The Cubs might be willing to do that as he clearly is not part of their plans in the bullpen this year. That's still very unlikely at this point though. Probably the two most likely to be traded then are Guzman and Patton, who have both struggled with their control in the early going but have shown flashes of what they can do. The Cubs might not want to give them the innings they need (especially since Guzman has clearly lost the 7th inning battle to Heilman), but another team might. The Cubs also have a few arms at AAA that another team might want for their major league bullpen.