Dustin Johnson has decided to call it quits with the caddie who was on his bag for both of his missed chances to win a Major last year and apparently, nearly caused Johnson to miss a tee time at Riviera.

Johnson's agent claims the split with Bobby Brown was mutual but there is plenty of reason for Johnson to have become fed up. He wouldn't, or couldn't, say is the split was permanent or not.

"They just decided to take a break for awhile," David Winkle of Hambric Sports Management said.

Brown had been Johnson's caddie for three years and was involved in some pretty dodgey situations.

The first was Johnson losing a three-shot lead in the US Open at Pebble Beach last summer and wound up with an 82, the highest final round by the leader at a U.S. Open in nearly 100 years. It's hard to place blame in situations like this, but pro golfers are seldom likely to blame themselves.

Two months later, Johnson didn't realize he was in a bunker at Whistling Straits and grounded his club on the 18th hole, a two-shot penalty that kept him out of a playoff. This one is a little more cut and dry, both of them should have known the rules but Brown especially should have been looking out for his player.

And finally, at Riviera this year, Brown gave Johnson the wrong tee time, and as a result was penalised two shots for arriving late to the tee. Even worse was that Johnson was only about 10 seconds away from disqualification. This is the caddying equivalent of not putting a cover sheet on your TPS reports.

To his credit Johnson did defend his caddie at all times, admitting that the responsibility was ultimately always with the player and sources close to the player claim these three incidents have nothing to do with the split but I'm not as convinced.

"There's no bad blood between him and me," Brown said. "We are very cool with each other and will remain very close. We're like brothers."