The Westgate Las Vegas Superbook has listed Johnson as the favorite to lead the Americans in points this week at Hazeltine, while McIlroy is the favorite for the Europeans. Both players are coming off strong seasons which came to a close at the Tour Championship, where a late rally let McIlroy take the FedEx Cup from Johnson's grasp.
Here are the full odds for top point scorer, according to Westgate:
U.S.: Johnson 7/2, Jordan Spieth 9/2, Patrick Reed 6/1, Rickie Fowler 10/1, Phil Mickelson 10/1, Matt Kuchar 12/1, Brooks Koepka 12/1, Ryan Moore 15/1, J.B. Holmes 15/1, Brandt Snedeker 15/1, Jimmy Walker 18/1, Zach Johnson 20/1
Europe: McIlroy 7/2, Justin Rose 11/2, Sergio Garcia 11/2, Henrik Stenson 6/1, Danny Willett 12/1, Lee Westwood 12/1, Martin Kaymer 12/1, Rafael Cabrera-Bello 15/1, Thomas Pieters 15/1, Matthew Fitzpatrick 15/1, Andy Sullivan 20/1, Chris Wood 30/1
Offshore outlet Bovada.lv is offering similar odds, with Johnson (7/1) just ahead of McIlroy (13/2) for top overall point scorer across both teams. They have also offered odds on top rookie and top wild card from both sides, among various other props:
Top U.S. rookie: Koepka 10/13, Moore Even (1/1)
Top U.S. wild card: Fowler 9/4, Kuchar 12/5, Holmes 3/1, Moore 3/1
Top European rookie: Willett 11/4, Cabrera-Bello 4/1, Fitzpatrick 9/2, Pieters 9/2, Sullivan 11/2, Wood 13/2
Top European wild card: Kaymer 7/5, Westwood 3/2, Pieters 11/4
Both outlets list the U.S. as favorites to win the Ryder Cup, with the Americans a -185 favorite at Bovada and -190 at Westgate while the Euros are +145 at Bovada and +170 at Westgate.
Those odds are based on what is called a "two-way line," where a 14-14 tie would result in refunded bets. On a three-way line, betting on the matches ending exactly in a tie pays either 10/1 (Bovada) or 12/1 (Westgate).