AKRON, Ohio - Phil Mickelson stayed on track in his bid to become world No 1 for the first time while South African Retief Goosen grabbed a one-shot lead after the second round of the WGC-Bridgestone Invitational on Friday.

Top-ranked Tiger Woods again struggled with his driving, but Goosen was in good form off the tee and on the greens as he fired a four-under 66 in rain-softened, overcast conditions at Firestone Country Club.

The smooth-swinging South African recorded six birdies and two bogeys for a seven-under total of 133, finishing one ahead of Americans Mickelson (68) and Justin Leonard (66).