Yankees and Bleachers

I will be coming down from SAC for the Sunday night game on the 4th against the Yanks. A good buddy and avid Yanks fan is coming over from back east for the weekend. He will be at all 3 games but I can only make it to the Sunday game, as of this moment. Anyways, for Sunday we bought the $9 left field bleachers tickets. Can someone explain why the section closet to the field in the outfield is the cheapest and also what we have to look forward to. My buddy is a loud mouth so I'm praying the A's are kicking the Skanks asses so we can all give him a hard time.