Misc: These letters define what - OCR?

Questions

Dartboards are made out of ---------- hairs.?

Four men in the history of boxing have been knocked out in the first ---------- seconds of the first round.?

In 1936, American track star Jesse Owens beat a ---------- over a 100-yard course. The horse was given a head start.?

In the United States, more ---------- discs are sold each year than baseballs, basketballs, and footballs combined.?

The ---------- is illegal as a high school sport in all states except Rhode Island.?