SECOND ROUND LEADERBOARD: -8 M Kuchar (US) -7 N Watney (US) -5 J Dufner (US), B Molder (US), D Johnson (US), SY Noh (S Kor), R McIlroy (NIre), Z Johnson (US), S Khan (Eng) B Watson (US)
Selected others:-4 M Laird (Sco)*, F Molinari (Ita)* -3 B Watson (US)* -2 E Els (SA), P Mickelson (US), S Dyson (Eng), B Davis (Eng) -1 T Woods (US)* E D Clarke (NIre) P Harrington (Ire)*, +5 S Garcia (Sp)+18 C Montgomerie (Sco)
* denotes players yet to complete their second round
Matt Kuchar fired a second-round 69 to lead by one shot after an abbreviated day two of the USPGA Championship at Whistling Straits.
Fog again delayed the start but Kuchar was eight under at the close, one ahead of fellow American Nick Watney.
Northern Ireland's Rory McIlroy and England's Simon Khan are in a seven-way tie for third on five under par.
Bad light meant Tiger Woods played only six holes and was seven off the pace, with half the field still to finish.
More to follow.