First, even if there was a pressure difference that might affect the ball trajectory ( which i doubt) every team would have to overcome the same situation so the field would be very fair.
next: i see that you are some what new to CD so if might be good for you to follow some of the the general rules for posting threads:
*Make a subject line that is relevant to the question being asked
*Typing in all Caps and Bolt is considered yelling and you get a much better response by being polite then yelling
*Please post your questions on the right forum. If this is a serious question about an event you should put it in the competitions forum, If this is a joke it should go in the chit chat forums.
i would also suggest that you read this thread and the respected threads linked in it.
http://www.chiefdelphi.com/forums/sh...threadid=41221