R1 LEADERBOARD US unless stated -5 J Ogilvie, L Glover, D Chopra (Swe), D McKenzie (Aus) - 4 P Mickelson, D Love III, C Warren, S Leaney (Aus), V Singh (Fij), R Allenby (Aus) Selected others: -3 KJ Choi (Kor), S Appleby (Aus) -2 J Furyk, T Immelman (SA) -1 L Donald (Eng), B Davis (Eng) E J Rose (Eng) +1 T Woods, M Weir (Can)

Americans Joe Ogilvie and Lucas Glover were joined by Swede Daniel Chopra and Australian David McKenzie at the top of the Illinois leaderboard on five under.

But Woods, playing his first event since missing the cut at last month's US Open, was on one over.

Phil Mickelson and Vijay Singh stayed in the hunt one shot off the lead.

Mickelson, starting from the 10th tee, bogeyed his first two holes but ended his round with an eagle.

After a solid tee shot, the USPGA and Masters champion sunk a putt from five feet.

"I was just trying to get on the green and the ball ended up rolling by the pin," Mickelson said.

Woods also enjoyed a decent finish to his misfiring round as he rolled in a 10-foot putt.

The world number one clawed back some ground after bogeying the sixth, 14th and 15th, where he lost his ball in the bushes.

"My distance control wasn't very good, my direction wasn't very good," said Woods.

"I hit the driver halfway decent. I just didn't take advantage of my irons when I had the opportunity."