Plaxico: “Where do I need to be, what do I need to do?”

Plaxico Burress might be in a familiar setting, but the offense is brand new. So the newest-old Steelers wide receiver knows he has to dive into offensive coordinator Todd Haley’s playbook if he’s going to make any kind of splash with Antonio Brown and Jerricho Cotchery injured. “I’ve seen some fast, talented guys through the…