I think they're in love

From http://www.naturevalley.com/Sponsors.htm:

Nature Valley granola bars is the Official Natural Energy Bar of the PGA TOUR and Champions Tour. Nature Valley is proud to distribute granola bars to volunteers, players and spectators at many PGA TOUR and Champions Tour tournaments.

From http://www.pgatour.com/info/partners#NatureValley:

Nature Valley Granola Bars is the “Official Natural Energy Bar of the PGA TOUR, Champions Tour and Nationwide Tour.”

Partnering with the TOUR allows Nature Valley to reach consumers with a healthy, active, outdoor lifestyle. Nature Valley will provide more than five million granola bars to players, volunteers and spectators throughout the year and leverage its TOUR sponsorship through integratedpackaging, print and Internet communications.

Nature Valley Granola Bars is a 100 percent natural source of energy in a great-tasting, easy-to-eat snack. It’s “the energy bar nature intended.”