Xander Schauffele had a 6-under 64 for the lowest 36-hole score of his career and a two-shot lead going into the weekend at the BMW Championship.
Woods had his lowest score in an opening round in nearly 20 years, but all that got him was a share of the lead with Rory McIlroy.
Fowler missed the last three week because of an oblique tear, but he says that might turn out to be the best for him.
Abraham Ancer of Mexico opened with three straight birdies in the third round at TPC Boston on his way to a six-under 65 to take a one-shot lead over a familiar figure.
From just over 70 feet away off the green on the par-5 18th, Simpson rolled in the eagle putt for an 8-under 63.
The former World No. 1 took a one-stroke lead in the European Tour's Made In Denmark event after a 5-under 67 in the third round on Saturday.
Eddie Pepperell shot a two-under 70 in the first round of the Made In Denmark in his bid to secure the final spot on Europe's Ryder Cup team.
Waugh has strong golf and business ties. He is finishing a three-year term on the PGA of America’s board.