Rory McIlroy feels he left shots out there as he finished his second round three shots off the lead at the Bridgestone Invitational.

The Northern Irishman carded a one-under-par 69 to keep himself in the mix for the big prize at Firestone Country Club in Akron, Ohio.

McIlroy, who is playing his first tournament since splitting with caddie JP Fitzgerald, admitted the wet conditions which stopped play did not help but knows he left a few chances out there.

He said: "Once we got back out there after the delay, I think everybody felt a little flat.

"I didn't help myself by missing a few chances as soon as we came back out. Luckily, I found one birdie coming in."

Meanwhile Jimmy Walker went round in 65 on Friday to take a two-shot lead from the overnight leader Thomas Pieters.

American Walker finds himself three shots clear of former world number one McIlroy going into Saturday's play in Ohio.