“I’m competing against him so I’m not rooting for him 100 percent like his family and friends are, but as a guy out here who plays the tour quite regularly with him in the states I feel like we root for each other here and there when we’re trying to do something like that, for a piece of history,” Dufner said, adding he wouldn’t be surprised if one or two more players made a run at the mark given the benign conditions. “It’s kind of neat to be part of history at the Open.”