Hey Sidewinder, sorry to necropost, but this is literally one of the few things I found about TFCC tears and DG. Did yours ever heal 100%?
Back in mid-March, my wrist was hurting one day, and like a fool, I ignored it and tried something extra stupid - grip the disc as hard as I can! It did add 40 feet backhand on one shot that day. Well, I paid for it. I woke up with the most god-awful pain and a swollen hand, had to either run cold water on it or hold it towards the sky - just to get to sleep. Thought I had some type of tendonitis at first, but narrowed it down thanks to youtube.
I'm doing much better all around since then... but still have limited flex and throw 1/3 my previous distance and my strength goes at certain angles. I'm giving it time. I've done literally 5 holes DG combined, mostly last week, since then when I used to play 1-2 rounds daily.