In the final round of the 2013 TOUR Championship by Coca-Cola, Keegan Bradley eagled No. 7 and celebrated by #Dufnering for his playing partner, Jason Dufner.
Jason Dufner: How Dufnering started
Keegan Bradley eagles No. 7 and celebrates by #Dufnering
@OldSchoolCaddie - The Dufnering Experience
Is 'Dufnering' the new 'Tebowing'?
Dufnering back in style after PGA win
Peter Jacobsen's "Jason Dufner" Impression