There’s no denying that Cowboys QB Tony Romo is very lucky to have been negotiating an extension during the same off-season Joe Flacco and Aaron Rodgers’ respective teams were working on new pacts. And it would be somewhat hysterical to claim that McNabb’s own history of postseason underachievement should preclude him from having an opinion. Though given the 140 character limit of Twitter, McNabb failed to mention that Romo’s sole career playoff victory came against a team quarterbacked by….Donovan McNabb.