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Australia's John Senden shot a six-under 66 to grab the Buick Open second round lead on Friday while Tiger Woods roared into contention behind his lowest round of the year.

Even as Senden was putting the finishing touches on a bogey free day to carve out a two-shot lead over American Michael Letzig the crowd was still buzzing about Woods' rise up the leaderboard.

Woods, who shot 71 on Thursday, arrived at Warwick Hills on Friday in danger of unwanted career milestone -- missing the cut at consecutive tournaments for the first time as a professional.

But a fired up world number one returned a nine-under 63 that was sparked by a sizzling birdie, birdie, eagle, birdie, birdie start to get to six-under after just five holes.

Playing his first event since the British Open where he failed to make the cut in a major championship for only the second time as a professional, Woods started the day tied for 95th and finished it in a six way tie for fifth at 10-under 134 just four behind Senden on 130.

Letzig moved into contention for his first PGA Tour title with a seven-under 65 while Vaughn Taylor (68) and Bill Lunde lurk one shot further back at 11-under 133.