If only I had trained in MMA early on, i could have been invincible, because, you know, arm bar and whatnot.
Its not too late. I would encourage you to walk into a local BJJ or MMA school and give it a shot. I took it up at the ripe age of 35, and we have guys in our gym starting at 40.
I'd bet dollars to doughnuts that your
elite athleticism won't do you a whole lot of good. Wrestling/MMA requires a completely different type of athleticism. I'm a good wrestler, and a decent BJJer. However, I can't jump very high, I'm not at all fast, I cannot hit a baseball (probably even if it were on a tee), my jump shot is terrible, I shoot free-throws like Shaq. I have almost zero hand-eye coordination. None of this matters on the mat.