By Joe Bradshaw.
Leaderboard:
-12 Schauffele (US), -11 Morikawa (US), -10 Theegala (US), -9 Scheffler (US), DeChambeau (US), Hubbard (US), Detry (Bel), -8 Finau (US), Hovland (Nor), Eckroat (US), -7 MacIntyre (Sco), Wallace (Eng), Koepka (US), English (US), Matsuyama (Jpn)
Selected others:
-6 Rai (Eng), Thomas (US), -5 Rose (Eng) McIlroy (NI), -3 Donald (Eng), -2 Hatton (Eng), -1 Fleetwood (Eng), Level Fitzpatrick (Eng), Rahm (Spa), Aberg (Swe), +4 Clark (US), Mickelson (US), +7 Woods (US)
Xander Schauffele stayed top of the leaderboard but saw his advantage cut to one shot on day two of the US PGA Championship.
After shooting a tournament record nine-under 62 on Friday, the Californian carded a more modest 68 to improve to 12 under.
Two-time major champion Collin Morikawa led the pursuit with a fine round of 65 to reach 11 under in rainy conditions, while world number one Scottie Scheffler put aside being arrested on Friday to shoot a five-under-par 66 and improve to nine under.
Between them is 26-year-old American Sahith Theegala, whose excellent 68 means he enters the weekend in third on 10 under par.
Scotland’s Robert MacIntyre reached nine under but finished with successive bogeys as he signed for a 69 and seven under total.
It was a disappointing day for Rory McIlroy who had a double bogey in a 71 that saw him slip seven shots back.
As the weather cleared up in the afternoon, scoring improved for most but not for Tiger Woods who hit two triple bogeys in three holes and he will miss the cut on seven over par.
The top 70 players plus ties made the halfway cut, which, eliminated all those who are not under par.
Former world number one Jon Rahm, England’s Matt Fitzpatrick and their Ryder Cup team-mate Ludvig Aberg are among the big names on level par to miss out.