The inaugural Humana Challenge is under way and the score board is lighting up as many of the world's best golfers take it low at PGA West.

 Considering the opening-round scores, fans should expect another birdie bonanza in the desert, with the majority of players picking Pro V1 and Pro V1x golf balls out of the cups.

A total of 99 players in this week's field are playing Titleist golf balls, more than seven times the nearest competitor with 14 and more than all competitors combined.

Titleist is also No. 1 in iron sets (41); sand, lob and approach wedges (123); and putters (57).