Bryce Easton produced a gutsy performance to open up a four-shot lead before darkness saw play suspended on day two of the Mallorca Golf Open.
The South African does not have full playing privileges on the European Tour but he held off a host of established names with five birdies and a bogey to get to 11 under before he was forced to walk in with one hole to play.
Home trio Jorge Campillo, Sebastian Garcia Rodriguez and Alvaro Quiros completed their rounds and were at seven under alongside Dane Jeff Winther.
Jonathan Caldwell was best of the Irish on three under after carding a one-over 71, while Cormac Sharvin just made the cut after a 70 left him on one over.
Niall Kearney just missed out on the weekend on two over after a 71, while Paul Dunne who had been three under at the start of the day endured a tough second round, slipping back to three over after a 76 to also miss the cut. Gavin Moynihan is 12 over after a 75.
Easton turned in 32 with birdies on the fourth, fifth and ninth and opened up a four-shot lead with a tee-shot to 12 feet on the 12th.
His advantage was trimmed when he dropped a shot on the 14th but a birdie on the 16th moved him back to 11 under.
"Lovely day, made it look a bit more difficult for myself on the back nine, had to grind out a few par saves," he said. "I played the front nine lovely, managed to hang in.
"Tough coming in at the end there. Obviously getting dark. Overall very happy with how today went, happy with where I am."
Overnight leader Winther carded a 71, while Campillo and Quiros recorded rounds of 69 and Garcia Rodriguez signed for a 67.