The Grayson Grass Challenge--a five-week handicapping contest to raise money for the Grayson-Jockey Club Research Foundation, returns to Horseshoe Indianapolis for the fourth time beginning Aug. 1 and continuing through Aug. 31. Participants in the challenge submit selections on two specified races held each week at Horseshoe Indianapolis. Each contestant will be given a $500 bankroll provided by Horseshoe Indianapolis from which participants can make win, place, show, exacta, trifecta, and superfecta wagers. At the end of the five weeks, all remaining bankrolls, plus winnings from the contestants will go...