Wondering if anyone has ever switched hands due to an injury.  If you did how much lower did you average and how long did it take to feel comfortable throwing with the other hand?  I realize everyone is different.

Yeah, it's really an individual thing. Some people are quite good bowling with the opposite hand. In fact, I know that there are individuals who have carded 300s and 800s with both hands, which is a pretty awesome accomplishment. Like anything, it will come down to training to build muscle memory. If you're fairly coordinated, in time, you'll probably be okay, but how long it takes to get there really comes down to the individual.