I can't imaging the pressure of playing on Sunday in top-level event, much less a major. Especially true if your only prior experience on the PGA tour was during the Thur./Fri rounds a couple of years back at the U. S. Open.
That said, I was hoping against hope that Bulle's four hole run at +5 during the 3rd round would be an aberration and that he would have a good day today. Very disappointed that he finished last among those who made the cut but at least he didn't have today's worst round (made by the much more experienced and #1 in the world Dustin Johnson).