If you went back through all the races he's mentioned riding I think that there would be a very small list of potential candidates. I'm not going to do it though.
If it were me, and I wanted to stay anonymous I'd throw in a couple of deliberate red herrings to throw the scent off. Or recruit a small group of riders to provide stories and have someone ghost write it as if they were one person.
If you went back through all the races he's mentioned riding I think that there would be a very small list of potential candidates. I'm not going to do it though.
If it were me, and I wanted to stay anonymous I'd throw in a couple of deliberate red herrings to throw the scent off. Or recruit a small group of riders to provide stories and have someone ghost write it as if they were one person.