Ooh, Dizz. That its so not good.
Last year, every one of my captains wanted me to play every match. You have to say no out of self preservation.
What I did was to write every match for every team on a calendar, along with the name of the opponent. Then figure out which matches will be the toughest and say you are available only for those matches. Period.
That way I got the right number of fun, competitive matches without burnout.
-- Random Error Generator, Version 4.0
-- Master Moonballer