Paul Casey held off Dustin Johnson, Louis Oosthuizen and Bubba Watson for his third PGA Tour victory Sunday at the Valspar Championship.

Maybe most impressively, Casey did it with the No. 1 player on the planet on his hip. Johnson trailed by one entering the final round, but Casey birdied the first and never took on a serious threat from the most threatening man in golf. It was Casey's sixth 54-hole lead but just his second victory in such scenarios.

Following a hilly front nine of 1-over 37, Casey tightened his game and his lead on the field with birdies on two of his first five holes on the back nine, and he played the final three holes in 1 over. The 72 in Round 4 was better than the field average on Sunday, and enough to seal the deal by one over Oosthuizen, and late closer Jason Kokrak. 

D.J.'s streak of rounds in the 60s came to a surprising end on Sunday in the final pairing with Casey. He made no birdies, less than 50 feet of putts (he made 90 in each of the first three days here), and for the second Sunday in a row, Johnson lost strokes to the field on the greens (he's missed three putts from under 5 feet in the last two weeks).