DeSean Jackson caught 9 TDs from Donovan McNabb in 2009 ... but he just revealed he had issues with the QB that year -- saying it's all because the former Eagles star made some remarks about his Pro Bowl selection.
Jackson sat down with LeSean McCoy, Brandon Marshall and Adam "Pacman" Jones to explain the situation on the latest "I AM ATHLETE" podcast ... saying his resentment toward the Philly signal-caller began after he earned a nod to the NFL's All-Star game in '09.