KansasCityChiefs

If you're a fantasy football manager trying to keep up with the NFL offseason, you're going to need a bigger whiteboard — and maybe a map. Because two franchises are packing their bags and crossing state lines, a former GM is already engraving "backup" on a rookie's locker, and Kyle Pitts is getting paid like the star he's become. Here's the full breakdown, with fantasy football implications built in. Home Sweet Dome? Two NFL franchises might be trading their current…