In 65 and above.
Team only has 10 players to start game with 11th on the way.
Can the 11th player enter as the 11th hitter...
At any time in the game?
Not at all?
Not after the team has gone through the order once?
Thanks.

LMR.. you stated 65 and above ..there are 2 slightly different rules for under 70 and over 70

below are the rules

4.3 • NUMBER OF PLAYERS ON A TEAM

4.3(1) • MEN'S DIVISIONS UNDER AGE 70+ AND MEN’S AND WOMEN’S 40-MASTERS
Ten players constitute a team. However, a team may start a game with no fewer than nine players. A tenth player on the roster may be added any time during the game, batting in the last (10 ) position. Until the tenth position is th
filled, an out will be declared only the first time that position comes to bat.

A. For men’s 70+ through 80+ and women’s divisions age 50+ and above
– Eleven players constitute a team. However, a team may start a game with no fewer than ten players. An eleventh player on the roster may be added any time during the game, batting in the last (11 ) position. Until the (11 )
th position is filled, an out will be declared only the first time that position comes to bat.

Thank you B.J.
Just for the sake of completeness 65's now play with 11.
But you did answer my question.

LMR.. yes I forgot
that rule was just amended to 11 for 65's last Nov/Dec ..