By Larry Fine SPRINGFIELD, New Jersey (Reuters) - Jimmy Walker said winning the PGA Championship on Sunday for his first career major was a matter of trust, both in himself and in his game. Felt confident in my golf swing, my putting, my chipping," said Walker, who had missed four cuts from his last eight events but found something "clicked" over the last nine holes of last week's Canadian Open. Trust all the stuff that I have been working on, and that's what I tried to apply out there." It was an arduous day on the water-logged Baltusrol, as Walker and the leaders came in early Sunday morning to play all 18 holes of the third round before a three-hour break ahead of their tee times for the final round. More...