• THE UPSHOT

    Productive break boosts Dufner's confidence

    The 2013 PGA champ leads by one after 36 holes at PGA West

  • Jason Dufner is leading the field in total birdies (16) and has dropped only one shot in two rounds. (Jeff Gross/Getty Images)Jason Dufner is leading the field in total birdies (16) and has dropped only one shot in two rounds. (Jeff Gross/Getty Images)