Shane Lowry fired a record 62 at Doonbeg to lead by three, while Rory McIlroy was left searching for answers on the greens.
Joaquin Niemann fired a 65 to lead the Irish Open at Doonbeg, with Shane Lowry two back and Rory McIlroy still in touch.
Michael Kim defends in Paris as Cameron Smith and world No. 21 Ryan Gerard join a loaded Le Golf National field from 24-27 September.
McIlroy defends at Doonbeg with a third Irish Open title, Race to Dubai ground and an elite field all in play.
Fresh from victory in Poland, John Gough returns to a course where he has already won, with a third title carrying a far bigger prize.
Thriston Lawrence shoots 62, survives four playoff holes and ties Seve Ballesteros with a third Omega European Masters win.
John Gough claimed a second HotelPlanner Tour title in Poland, moving to fifth on the Road to Mallorca and closer to DP World Tour promotion.
Paul Casey leads by three at Crans-sur-Sierre after a 63, with home ties, a charity pledge and four players chasing on 13 under.
Thriston Lawrence leads by two at Crans after a bogey-free 63, with Nacho Elvira and Jeremy Paul applying pressure before the weekend.
Ashun Wu fires a bogey-free 63 at Crans, with defending champion Thriston Lawrence among five players just one shot behind.