Detroit is speculating that it's Rapada. "Leyland stopped short of disclosing the traded player, but speculation is centered on Clay Rapada, who is 6-2 with a 3.74 ERA at Triple-A Iowa." link Rapada is on the 40-man, which means he'd have to clear waivers to be traded. Pretty doubtful that a cheap lefty reliever with decent numbers makes it through waivers. Which is why they made it a PTBNL deal so that they could trade them Rapada after the year. Personally, if it's a Cubs left-hander currently on the 40 man roster like Leyland said, then I don't really care if it is Eyre, Ohman, Cotts, or Rapada. They each have a small bit of value, but none of them have particularly great value now or in the future. The PTBNL has to go to Detroit by Oct 15th though.