Money rankings leader Todd Hamilton charged to the top of the leaderboard with a 6-under-par 66 in the second round of the Mizuno Open on Friday.

Starting his round four strokes off the pace in driving rain, the 38-year-old American tore up Setonaikai Golf Club's 7,256 yard-layout with seven birdies -- five of them on a bogey-free back nine -- against a lone bogey to take a one shot lead on 8-under 136.