He improved on his overnight lead of one by landing two birdies but slipped up on the par three 14th. This still allows him a four shot advantage over Pettersson and Wi who finished the day on six under after rounds of 65 and 70 respectively.
Behind them sit Jeff Overton who finished the day with a 69 and heads into the final day on five under just ahead of fellow American Ryan Moore. After a promising start to the tournament Jason Day experienced a disappointing 72 which realistically takes him out of contention.
“I obviously played solid for the most part. When I was in trouble, my short game really pulled me through. There were a couple times on the back nine I kept the momentum going.
“I thought the key moment of the day actually was a bogey I made on 14. I probably hit the wrong club there and I was in a wicked lie, long left.”
Rose knows this position well after heading into the final round at the Travellers Championship last week where he was three strokes up but after a torrid back nine he found himself joint ninth and left disappointed.
Further down the leader board was Tiger Woods who wrote in a second consecutive even round of 70 still far from where he would like to be.