I'm an athlete who just claimed my stake, do I have to pay taxes on this?

Yes. Fanstake will provide tax documents (1099-K) with the specifics of the contract, and it's your responsibility to pay taxes on any money you receive from Fanstake if it reaches the IRS/State thresholds. We'd recommend speaking with a licensed tax accountant or attorney to ensure you're compliant with all state and federal laws.