Northern Trust: Jordan Spieth one of four sharing Northern Trust lead

Northern Trust, second-round leaderboard-6 J Spieth (US), D Johnson (US), R Fowler (US), J Vegas (Ven); -5 M Kuchar (US), B Watson (68); -4 J Rahm (Spa), J Rose (Eng), R Henley (US)Selected others: -3 P Casey (Eng); -2 M Laird (Sco); +1 I Poulter (Eng), R McIlroy (NI); +2