GREEN BAY, Wis. -- Packers coach Mike McCarthy blames Greg Jennings' new wardrobe for the verbal jabs the receiver has been taking at Aaron Rodgers.

"You know, when you put on that purple, something happens to you," McCarthy said Thursday, drawing laughs.

Jennings became the latest big-name Packer to sign with Green Bay's archrival this offseason, going to the Minnesota Vikings as a free agent. Since then, the Packers' former No. 1 receiver has taken a series of thinly veiled shots at Rodgers. He has refused to call the quarterback by name, referring to him instead as "12" or "the guy they have now," and dismissed Green Bay's facilities as "cookie cutter."