Rory McIlroy's hopes of picking up much-needed form before the British Open in July ended in more disappointment this evening when he missed the cut at Carton House.

The world number two improved his two-over par first round Irish Open score to card a level par 72, but that was not good enough to keep him in the tournament.

The 24-year-old Northern Irishman was 11 shots off the lead at the end of his round. The form of the two-time major winner form has dipped alarmingly in recent months.

In the second half of 2012, he won four tournaments and was top of the world rankings, but after changing his club manufacturer he has recorded just one top-five finish in 13 events.

McIlroy was not the only Irish golfer to struggle at Carton House - Padraig Harrington, Darren Clarke, Damien McGrane and Graeme McDowell all failed to make the cut after today's second round.

Harrington finished with a two over 74, Clarke ended today with 75, McGrane shot 78 while McDowell had a 74.

American Peter Uihlein and England's Robert Rock share the lead on nine under 135.

Robert Rock shot a six-under-par 66 to join Uihlein at the top of the leaderboard, while both are being pressed by former Ryder Cup captain Jose-Maria Olazabal, after a 69 put him in a group on seven under par and joint second.

Shane Lowry and Dutchman Joost Luiten are also in Olazabal's group in joint third.

Overnight leader Oscar Floren of Sweden could not match his first round 66, but did manage to produce another sub-par round of 71 to join Spaniard Olazabal on seven under for the tournament.