Which game is this for, PGA 2K or EA PGA?
For EA, there's a thread over at their forums that talks about this:
https://answers.ea.com/t5/General-Di.../td-p/12445374
You might have to create a new character if you want to totally start over. You could delete the local save files, which would let you start career over again with your same character, but your character would still have all their stats and attributes.
For PGA 2K23, it's not easily doable, from what I gather. 2K23 does let you easily restart career mode (there's a Reset Career Mode option in the game, I think), but you'll always have to use your same MyPlayer and your fittings will always be there as they are tied to your account. On reddit, the only option people were giving were to create a new account on your console, switch to that one, and only then could you totally start over:
https://www.reddit.com/r/PGA_Tour_2K...nd_start_over/