Hey @JonoG this sounds like a real irritation, I can imagine you just want to feel at ease and focus on the game. Are these all things that you've potentially googled that could happen, or have you seen someone in the sport suffer one of these injuries?
Do you have a counsellor you could speak to about this? Some of these anxieties definitely require a tailored and professional support. It will help you feel at ease around the reality of these outcomes. In terms of strategies, mindfulness and meditation is usually really positive for any form of anxiety. The headspace app particularly or Smiling Mind. I will tag some other members too for their input 
KHL can also chat with you, they work with 14-25 y/os and have a tonne of experience with anxiety.
Heya @JonoG,
I agree with @Bree-RO that it's probably best to chat to a professional about these worries, if you're feeling up for it 
in the meantime though, I also wanted to point out these health anxiety self-help resources which may also be useful
Hey @JonoG it must be hard to focus on the game with all these worries in your head!
A technique I sometimes use when I'm worrying about something is called 'being a fact detective.' Think about the facts - think about all the times you've played rugby and NOT been hurt, or about all the games where everything goes really well and the players stay healthy!
I agree that kids helpline could be a good resource; I've spoken to them before and they're very friendly and knowledgable
