I hyper extended my thumb a couple of years ago playing softball. Kind of a screwy injury. I still have pain at odd times. I told my doctor about this, he said that hyper extending your thumb is one of the rare injuries that will never really heal completely. There are limited exercises that you can do to re-strengthen the area, and so its just something you live with.
Now, it is not debilitating and I haven't stopped doing anything that I did before. However, I'm wondering how something like this could affect our best shooter, who is also a righty (he injured his right thumb). We'll have to see....
