In Florida the rule seems to have gone away. I used to coach HS back in late 90's early 00's. We had a 5 player rule. It didn't restrict the players it restricted the coach of the HS from coaching more than 5 on a TB team from their HS. Now I am starting to follow HS Softball again, as my DD is a freshman. A local college sponsors a HS softball fall league where all the local HS's put their teams together and play. Last fall I watched a couple games. A few of the teams were even coached by the HS coach themselves. This would have been a huge violation back when I coached HS. They even use the HS name on the shirt. It is almost like fall ball in college at the HS level. I am figuring that somewhere along the road, the rule was challenged legally and couldn't be upheld. Now it is a free for all.