Padraig Harrington carded a 68 to move to within four shots of the lead at the halfway stage of the Scottish Open.
The three-time major winner is the leading Irish contender at the Renaissance Club on seven under, one ahead of of Cormac Sharvin who carded a bogey-free round.
US Open champion Jon Rahm is in a three-way tie for the lead with John Senior and Thomas Detry on 11 under.
Rahm's playing partner Rory McIlroy, who had one of his clubs grabbed from his bag by a spectator at the 10th tee, just missed the cut after a second-round 71 left him on one under.
Graeme McDowell also misses the cut after finishing on three over after a 72, while Jonathan Caldwell finished up five shots further back on eight over after a 76.
Harrington, who is in a tie for 11th ahead of Saturday's third round, quickly set about building on his opening 67 with birdies on three and five.
After a bogey on the eighth, the Dubliner bounced back with more birdies on 10 and 13 before picking up a further shot on 17 having bogeyed the 15th.
Sharvin did not drop a shot as the Northern Irishman carded a 66 with five birdies to move up to six under.
McIlroy, meanwhile, was reluctant to speak in detail about the incident on the 10th tee which saw a man walk unchallenged on to the tee, take the distinctive dog headcover off his driver and then grab an iron from the bag as he and Rahm looked on in apparent bemusement as they prepared to begin their rounds.
But the four-time major winner said the incident had been "handled efficiently".
Having got underway, McIlroy birdied 13 and 18 but aside from another birdie on the second, bogeys on one, four and the eighth saw him ultimately miss the cut by one shot.
Co-leader Rahm enjoyed better fortune around the North Berwick course as the Spaniard carded a 65.
"Those first 10 holes I played incredible," he said.
"I was seven under through 10 and the three pars I had were short putts that could have been made. They were clearly birdie chances. That's not always going to happen.
"There were moments of luck too. If my second shot on 16 went two yards further than it did I would have had no shot to the pin. There were a couple of others like that. It was good golf combined with good luck.
"After that the elements changed and I was playing some holes in a wind I had never played before. I got a little hesitant.
"I made some aggressive swings without thinking about it as much as I could have because I was playing so well and maybe could have taken a step back. Swing-wise it's good. If I just clean up some little mistakes it could be better."