Back in 73 I was in the 1st row 3rd base side watching the Ranger and A's when my friend on my left said something to me and I turned to respond and got hit in the head with a line drive. I was my extremely dizzy but did not pass out. I don't remember which A's player hit it but back then they gave me a card for free beer the rest of the game.
On a side note my wife says "that explains a lot".
Once, at the BOB, my former wife and I were sitting a few rows back from the field, part way up the third base line, I was doing what I like to do at games -- spend a minute observing one player in the field to see how (if) he prepares himself for the pitch.
As my attention was on the left fielder, the batter hit a line drive which ricocheted off the back of the seat in front of my former wife and glanced off her knee. Luckily, she was OK. Of course, I was embarrassed because, as a lefty, my 1B mitt was on my right hand, right there, had I been watching the batter.
I got into the habit, by the way, because one time a buddy got us tickets and we sat way out in RF, right behind Reggie Sanders. I liked Reggie, but he had a bad habit. He was the only fielder who never crouched down as the pitcher delivered.
The first time I noticed it, sure enough, the batter hit the ball to Reggie's left and he made a half hearted attempt to get to it. It went right by him for a triple.