If you are playing straight ASA rules, yes you only bat 9 players. You can use the DP/Flex which has 10 players in the lineup, but only the first 9 bat. Every player has 1 reentry, once a player has occupied a spot in the batting order, that is the only position they may reenter.
Let's say you use the DP/Flex and have 10 in the lineup. ...
Can the Flex bat? If so, must she bat for the DP?
Can the DP play in the field? What are the restrictions?
If you have a sub, can she play the field with unlimited entry?
For NSA there are no limit on subs correct? And you can bat full lineup, basically the same as pool play.
In ASA, must the courtesy runner be a sub if you have one?
If you are playing straight ASA rules, yes you only bat 9 players. You can use the DP/Flex which has 10 players in the lineup, but only the first 9 bat. Every player has 1 reentry, once a player has occupied a spot in the batting order, that is the only position they may reenter.