American Ben Griffin warmed up for the Ryder Cup by moving into a three-shot lead at the end of the second round of the Procore Championship.

Griffin, who is part of a 12-strong United States team to play the Ryder Cup from 26-28 September in New York, shot a second round 66 in Napa, California.

The 29-year-old sank six birdies without dropping a shot as he moved to 14 under.

“I’ve been pretty focused on this golf tournament,” said Griffin, who was a captain’s pick by US Ryder Cup skipper Keegan Bradley and will be making his debut in the event.

“Without a doubt, off the golf course hanging out with the guys and stuff, there’s been some Ryder Cup presence. But once I get on the first tee, I’m thinking I’m trying to play well here.

“This week I’m trying to literally do the same stuff I’m doing. I’m trying to stay confident, stay motivated and keep the pedal down.”