Casey Wittenberg and Ryan Palmer also were at 9-under and still had to finish their rounds.

NPR: Stormy Round At Players For Tiger And Sergio

Defending champion Phil Mickelson was six shots back alongside PGA champion Keegan Bradley and Ryan Palmer.

CNN: Tseng has company in battle for first women's major

Four shots off the lead are a trio of Americans -- Ryan Palmer, Steve Stricker and Cameron Tringale.

CNN: Wiesberger waltzes to Ballentine's victory

Robert Karlsson, Harris English and Ted Potter Jr. shot 64, and two-time major champion Angel Cabrera, Ryan Palmer and Camilo Villegas were at 65.

WSJ: Keegan Bradley shoots course-record 60 at Nelson

Scott Piercy closed with 61 to be third on 23 under, one shot ahead of fellow American Ryan Moore (65), while Ryan Palmer carded 62 for fifth on 19 under.

CNN: Mickelson flirts with history in wire-to-wire Phoenix win