The young Kiwi banked $NZ52,000 and is now on the cusp of securing a European Tour card in 2022.
The 25-year-old's round included four birdies and a triple bogey.
The Kiwi has had two top-10 finishes, before this week's Mallorca Masters.
The Kiwi has one tournament remaining, before flying home for Christmas.
The American successfully sued for the right to use a golf cart on the PGA Tour.
Previously one shot off the lead, the Kiwi now sits in a six-way tie for 10th place.
The Kiwi is part of a four-way tie for second place in Spain.
The Northern Irishman was powerless to stop the biggest American victory since 1981.
The home team needs three-and-a-half points on Monday to claim victory.