The York Revolution have decided to find out by bringing in a former member of the Tampa Rays organization, 3'2 Dave Flood as a pinch-hitting specialist. ... "If I were seven feet tall I'd be putting a basketball through a hoop," said Flood. "I should be able to take advantage of my height to draw a walk. Sometimes this might be leading off a game, sometimes it could be as a pinch hitter with the bases loaded in the bottom of the 9th."It's probably mostly just a publicity stunt by an indepedent-league team. But the thing is, I can't work out any reason to be directly opposed to this idea that isn't blatantly prejudicial. The only thing I can say is that I think that anyone who plays on offense should have to play defense as well, and vice versa. The only exception in my mind should be pinch hitting or pinch running, where you've chosen to remove a player from a game rather than allowing their weakness to be exposed.
Even then, however, I can't justify a reason to prevent teams from using one of their roster spots for someone who can only pinch hit, and will require a pinch runner if s/he gets on...which they will probably do at least 50% of the time (0.500+ OBP). It'll be interesting to watch this.
Update: Additional discussion at Tango's blog.