Vijay and Qass Singh eagled the par-5 18th hole for a 13-under 59 and a two-stroke lead Saturday in the PNC Father/Son Challenge scramble event.
The Singhs also had 11 birdies at the Ritz-Carlton Golf Club.
Davis and Dru Love, Lanny and Tucker Wadkins, and Steve and Sam Elkington were tied for second in the 36-hole tournament. Nick and Matthew Faldo, Fred and Taylor Funk, Larry and Drew Nelson, and Lee and Connor Janzen were another stroke back at 10 under.
Defending champions Bernhard and Jason Langer were tied for ninth at 63. Jack and Gary Nicklaus were tied for 14th at 64.