Lowry must complete his second round on Saturday before starting his third on the day. Second round leaderboard – 9 S Lowry (Ire); -8 T. Mullinax (USA); -7 D Johnson (US), E Grillo (Arg); -6 CT Pan (Tpe), R Sabbatini (Svk) Other selected: -5 I Poulter (Eng), G McDowell (NI); -4 T Fleetwood (Eng), M Kuchar (USA); -3 J Spieth (USA); -2 E Pepperell (Eng), S Power (Ire); -1 L Donald (Eng), X Schauffele (US), E Els (SA); Level M Fitzpatrick (Eng); +1 B DeChambeau (USA); +2 D Willett (Eng); +3 R Knox (Sco), M Laird (Sco) Leaderboard

Shane Lowry from Ireland was led by one shot at the RBC Heritage when darkness opened the game with two holes of his second round left.

Storms had previously delayed play in South Carolina, where Lowry, 32, had a one-stroke lead after the first round.

On Friday, he improved to nine & # 39; under par & # 39; to stay away from Trey Mullinax, who scored three-under-68 in the second round.

World number one Dustin Johnson and Emiliano Grillo are both seven years after shooting under-under-par 67 & # 39; s.

Taiwan's Cheng-tsung Pan is another step back after climbing the leaderboard with a six-under-65, while Northern Ireland's Graeme McDowell and Ian Poulter from England belong to a large group out of five under par

Lowry is one of 56 players, including McDowell, Donald and Tommy Fleetwood, who have to complete their second round at Hilton Head on Saturday before starting the game later in the day.