Ryder Cup rookie Ben Griffin set an impressive clubhouse lead, with Russell Henley and JJ Spaun heading the chasing pack, on a strong Friday for several members of Keegan Bradley's US side in the second round of the Procore Championship.

All but two of the 12 players who will take on Team Europe at Bethpage Black from September 26-28, live in full on Sky Sports, are in the field this week in Napa, California.

And Griffin - who will make his Ryder Cup debut as a wildcard following his first two PGA Tour wins this year - finished his second round leading two US team-mates at the top of the leaderboard, as it stood mid-way through Friday's action.

The 29-year-old followed up his opening-round 64 with a second round of 66 to set the score to beat in the clubhouse at 14-under par.

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