One Korean journalist for KBS worked on a feature on baseball players being hit by pitches, and did some firsthand reporting to find out if it hurts to be hit by a baseball. It does!
The whole video report—which isn't embeddable—is worth watching, and you don't need to understand Korean to figure it out: Pitches to the head, whether intentional or not, are causing injuries in baseball. The best part is definitely the high-speed camera footage of baseballs hitting a wash basin and frying pan, set to music that sounds like the Halloween theme.
Google Translate struggled with the article, but here's part of the text presumably right before the intrepid reporter was beaned:
This time I have the power of the pitcher threw the ball , let's firsthand what extent