While I like the solution to the problem, it doesn't always work too well.
What if he's a right handed batter, but pitches left-handed? Then he should wear one to protect his elbow. I don't personally wear one, but I switch hit and have thought about getting one for my right arm even though I don't pitch. There's a little bit too much bone right there in the elbow to mess up than to have that sort of attitude toward it.
Also, if you were to ask anybody that knows me, they'd be able to tell you that I'm somewhat of a "ball-magnet." Last year alone I got hit in the head twice. Once in the first week of May when we went on the 7 game, 6 day spree I of course took a curve ball to the lip busting the inside of my lip. And of course I had to do it on the 2nd day of the week. 5 stitches later I played 3 days later finally. Two weeks after that, I took a fastball to the back of the head- everybody from Waterloo there freaked out! That fastball didnt hurt nearly as bad as the curveball did
I've only had two "major" injuries. Both sent me to the hospital and both involved the dang baseball colliding with my facial bones. Luckily neither of them were terribly severe.
So, along those same lines, who wears a facemask while batting? Pros? Cons?