Not even "another team" in this case, because we're the only team in this town that plays in this league. So it'd basically be another team or nothing, and granted sure, she could argue she doesn't have to play, and she's fully within her right to do so, but she'd definitely face a lot of backlash for starting, then stopping, then starting again, then stopping again all because she couldn't get her number/way when she rightfully knows she lost that chance and is pissy over it. Welcome to the real world - get used to it.
Can you peel one of the 1's off of #11 and make it a #1? You could also keep some white coaches tape handy, if an umpire questions having two #11's make one of their jerseys into #17 by adding some tape at the top of the 1.
Honestly, I think you'd be better off telling her see ya later. If she does decide to play, you now have an instant malcontent on the team. Malcontents almost always turn into cancers. Especially among teenage girls. She can make life very difficult for the girl who has "her" number. If the malcontent is socially skilled they have a way of turning an entire team against another player.
I do think it is worth a negotiate but once decision made it is over, do not want to hear about it again.
Hopefully this is just being dragged out on this board and you are not actually going back and forth with her about this.
If she is not going to play because she can't get her number back good riddance.
When we spoke about this on Saturday, these were her exact words (messages) to me about the matter: "I don't know what to say. I get that I'm being a little b*tch about it. But it's not just a number to me. Its been with me through my whole journey of finding myself as an athlete. I played more cumulative time on your teams than she has. I get she played the full season so she's more "committed" or whatever. But I just don't know right now"
I usually come off as a little harsh with my DD and her teammates (18U), and my wife says I need more of a filter, but my response would have been "tough $%#$, suck it up buttercup"...
I get that I'm being a little b*tch about it. But it's not just a number to me. Its been with me through my whole journey of finding myself as an athlete.