Golf - Walker strides into halfway lead at WGC-Bridgestone

August 4, 2017; Akron, OH, USA; Jimmy Walker acknowledges the crowd after making his putt on the eighth hole during the second round of the WGC - Bridgestone Invitational golf tournament at Firestone Country Club - South Course. Mandatory Credit: Kyle Terada-USA TODAY Sports

(Reuters) - Jimmy Walker, one week away from the defence of his PGA Championship title, fired a five-under 65 to seize a two-shot lead after two rounds of the World Golf Championship-Bridgestone Invitational on Friday.

Walker was unfazed by a pair of weather delays totalling nearly five hours and registered six birdies and a bogey to reach the midway mark on seven-under-par 133 at Firestone Country Club in Akron, Ohio.