Dec 09, 2008 9:01 AM EST

The Phillies were working on a complex trade on Monday night that could land them Mark DeRosa.

According to rumors, DeRosa could end up in Philadelphia as part of a blockbuster trade that would send San Diego's Jake Peavy to the Chicago Cubs.

There were also rumblings that a fourth team, perhaps the Orioles, could get involved.

"Three teams, possible," a Phillies' source said. "Four, doubtful."

Via Philadelphia Inquirer