Puffing only lightly despite his 44 years, the man in the sneakers, sweatshirt and shorts jogged determinedly around Long Island's Roosevelt Raceway, a half-mile track ordinarily reserved for horses. At the early-morning hour, the trotters were out exercising too, pulling balloon-tired practice sulkies, passing the two-legged runner in a flurry of neighs, snorts and hooves. The man barely noticed. Lou Miller, New York World-Telegram and Sun sportswriter, was warming up for work.
Four miles or so later, flushed and refreshed ("I'm as strong as any horse"), Miller exercised half a dozen horses for...