No. 2 overall pick Morant, a point guard who led Murray State to an NCAA Tournament first-round victory, is the second favorite at 4-to-1.The No. 3 overall pick, chosen by the Knicks, Barrett has the third-best odds at 6-to-1; he was a teammate of Williamson’s at Duke and a Sporting News All-America choice as a freshman.MORE NBA DRAFT: Winners & Losers | Grades for each pick Oddsmakers assessing the contenders for 2019-20 NBA Rookie of the Year are going pretty much by the book by installing top picks Zion Williamson, Ja Morant and RJ Barrett as the first, second and third choices to win the award.Williamson, who claimed every major college basketball player award with his freshman season at Duke, is a 1-to-2 favorite to win the award in his first year with the Pelicans, according to odds provided by BetOnline.com. Williamson was the first overall pick in Thursday night’s NBA Draft. The oddsmakers believe more in No. 5 pick Darius Garland and his chances to make an impact with the Cavaliers, placing him at 10-to-1, than fourth pick De’Andre Hunter of the Hawks, who is 14-to-1.Wing Jarrett Culver (16-to-1) of the Timberwolves and point guard Coby White of the Bulls (20-1) are far ahead of the next group of contenders: Cam Reddish of the Hawks and Jaxson Hayes of the Pelicans (28-to-1) and Cam Johnson of the Suns (30-to-1).The highest-ranked second-round choice is former Maryland big man Bruno Fernando of the Hawks, who is 50-to-1 on the BetOnline chart but went 34th overall in the draft. He is ahead of 11 players who were first-rounders and is tied with five others, including lottery picks Romeo Langford of the Celtics and Tyler Herro of the Heat.