AUGUSTA, Ga. (AP) _ Bill Haas broke 70 at the Masters today for the first time in five appearances at Augusta National. His 4-under-par 68 gives him the lead in a major for the first time in his career.
The 31-year-old American opened the tournament with a bogey but bounced back to knock in six birdies on a warm, sunny day when only three other players got into the 60s.
Defending champion Adam Scott and 2012 winner Bubba Watson are both at 69, one shot back and tied with Louis Oosthuizen (WUHST'-hy-zehn).
Marc Leishman joins first-time Masters invitees Kevin Stadler, Jonas Blixt, Gary Woodland, Jimmy Walker, K.J. Choi and Brandt Snedeker (SNEH'-deh-kur) at minus-2.
And with a record 24 Masters rookies competing, 54-year-old Fred Couples is in the mix following a 71. He led after the second round two years ago, after the first round in 2010 and won in 1992.
Phil Mickelson had a triple-bogey on 7 and a double-bogey on 15 en route to a 4-over 76, one off the worst scores of his Masters career. Lefty is trying to join Arnold Palmer, Jack Nicklaus and Tiger Woods as the only players to win at least four Masters.