PORTSTEWART, Northern Ireland — Rory McIlroy missed the cut at the Irish Open for the fourth time in five years, leading the four-time major winner to express concerns on Friday about parts of his game ahead of the British Open.

McIlroy shot 1-over 73 in his second round over the links at Portstewart and was 1 over for the tournament, which he is hosting to benefit his foundation. He was four strokes below the cut mark and 14 strokes off the joint leaders, Benjamin Hebert and Daniel Im.

"My short game is not sharp enough and I'm making silly mistakes," said McIlroy, who refused to blame his performance on the fact he was busy at the start of the week because he was hosting the event. "I'm not being very proficient with my scoring and making it difficult for myself."

McIlroy also missed the cut at the U.S. Open last month and hasn't had a victory so far in 2017, during which he has had two spells out because of a rib injury. He will play one more event — the Scottish Open at Dundonald Links next week — before the British Open, which starts on July 20 at Royal Birkdale.

The only time he made the cut at the Irish Open since 2012 was last year, when he won. He finished this year's event by slamming his driver onto a tee marker following a poor drive on the seventh, his 16th hole of the day, before making double-bogey on the next hole.

"It's disappointing because I felt like I was playing well coming into the week and I need to do some practice over the weekend and get ready for next week," McIlroy said.

"Even being busy on Monday, Tuesday and Wednesday, I should be shooting two scores in the 60s with the conditions the way they were."

Jon Rahm, playing in the same group as McIlroy, shot 67 to be alone in third place, a stroke off the lead held by the pair that also topped the leaderboard after the first round. Hebert and Im both shot 67 in their second rounds.

The No.2-ranked Hideki Matsuyama shot 68 and was five shots back.

PGA: At White Sulphur Springs, W. Va., Sebastian Munoz shot a 3-under 67 to lead Ben Martin and Hudson Swafford by three strokes after the second round of The Greenbrier Classic.

Munoz, a 24-year-old Colombian, continued his solid play after an opening-round 61. He heads into the weekend at 12-under 128 and leads after 36 holes for the second time in his rookie PGA Tour season. He shared the lead halfway through the St. Jude Classic but played the final two rounds in 11 over.

Martin shot 67 and Swafford had a 66.

Davis Love III, seeking to become the oldest-ever winner on the PGA Tour at age 53, shot 69 and is at 8 under, along with defending champion Danny Lee and Russell Henley. Henley tied the day's best round with a 64.

LPGA: At Oneida, Wis., Katherine Kirk shot a career-best 9-under 63 to take a three-stroke lead in the weather-delayed second round of the inaugural Thornberry Creek LPGA Classic.

Kirk, a 35-year-old Australian who has two victories in 14 years on the LPGA Tour, played the back nine in 7-under 29 at Thornberry Creek, the Oneida Nation-owned resort near Green Bay. She eagled the par-5 13th and hit a hybrid to 4 feet on the 196-yard, par-3 17th for her final birdie of the day to finish at 13-under through two rounds.

Kirk finished her round before a 3½-hour delay for lightning in the area.

Jaye Marie Green birdied eight of her final 12 holes to shoot 66 and was three shots back. Sandra Gal of Germany was also 10 under through 13 holes when play was suspended because of darkness.