I played baseball from the age of 3 until I turned 19. I now play tennis. You cannot compare the fear you feel in baseball to anything in tennis. You cannot call a baseball player a wuss when they constantly have a projectile flying at them at upwards of 90mph that (unlike a tennis ball) can do serious damage.
Last time I checked you weren't allowed to chuck a baseball at an opponent? Kinda makes your point moot doesn't it now?