The championship in Reno has brought in modified Stableford scoring in a bid to increase the excitment for fans and produce some big swings on the leaderboard.
Andres Romero certainly enjoyed the new system as he posted a total of 14 points to lead the field at around the midway point on the first day. The Argentinian knocked in seven birdies, which each earned him two points, to move in front of American Josh Teater.
Teater's 11-point total was made up of an eagle on the 18th hole - which earned him five points - four birdies and two bogeys, which knocked two points of his final score.
Americans dominated the top of the leaderboard, with Hunter Haas on 10 points and Todd Hamilton, Chris Kirk and JJ Henry just one point further back.
But for those who struggled on the Montreux course, the Stableford scoring left them with a huge deficit to make up. Canada's Mike Weir recorded three double bogeys - which brings a score of minus three - as well as five bogeys which left him on -12 after his first 18 holes.