honesty will get you booted. the coach will probably admire the honesty... but to be fair to the other team members, will boot you anyway.
it would have to be some kind of emergency. or something you didn't know about in advance. If you know anybody that works in the office, or can go to the office, try to get one of the notes they send to student swhen they get a phone message during class. Then write in something like "mother asks that you pick your uncle up from the airport after school" or something like that.
but then if you want to be real about it, why skip if you want to be on the team?