Aphthous stomatitis (Canker sore). shallow ulcer with a white or yellow center and red border; seen on the inner side of the lip and cheeks or on the tongue; it begins with a burning or tingling sensation and slight swelling; painful; usually lasts 7-10 days and heals without a scar. î î î.
It was all a cheap publicity stunt. One of the regulation features of early ballparks, supposedly, was a gigantic billboard advertising Bull Durham tobacco, inevitably located out in left field, near the pitchers' warm-up area. Hence the bullpen was the pen near the Bull. (Which, frankly, sounds like a lot of bull to me.)
Jon Miller, a baseball analyst with ESPN, said the term is derived from the late 19th century. The New York Giants first played at the Polo Grounds, which opened around 1880. The relief pitchers warmed up beyond the left-field fence. Out there in the same area was a stockyard or pen that had bulls in it.