The former champion Luke Donald was the biggest name to fall in the second round of the snow-delayed World Golf Match Play Championship after being pummelled 7 and 6 by American Scott Piercy.
The British world number three was totally outplayed by Piercy, who was effectively seven under par on his ball after being conceded a four-foot birdie putt at the short 12th to seal the win at Arizona.
The stunning departure of Donald follows the premature exits yesterday of Northern Irish world number one Rory McIlroy and three-times champion Tiger Woods.
Long-hitting Belgian Nicolas Colsaerts became the first player to reach the third round today with a 4 and 2 upset win over British world number six Justin Rose.
The Australian Jason Day moved into the round of 16 after an extra-holes victory over American rookie Russell Henley.
Day needed 19 holes to dispatch the recent US PGA Tour winner, to book a showdown with Masters champion Bubba Watson in the next round.
The news wasn't as good for the other Australian left in the $US8.5 million ($NZ10.14) event with Marcus Fraser going down 4 and 3 to Swede Fredrik Jacobson.
Webb Simpson (USA) bt Peter Hanson (SWE) 1-up
Graeme McDowell (NIR) bt Alexander Noren (SWE) 20 holes
Steve Stricker (USA) bt Nick Watney (USA) 21 holes
Gonzalo Fernandez-Castano (ESP) bt Charles Howell III (USA) 6 and 5
Bubba Watson (USA) bt Jim Furyk (USA) 22 holes
Shane Lowry (IRL) bt Carl Pettersson (SWE) 6 and 5
Fredrik Jacobson (SWE) bt Marcus Fraser (AUS) 4 and 3
Robert Garrigus (USA) bt Louis Oosthuizen (RSA) 3 and 2
Jason Day (AUS) bt Russell Henley (USA) 19 holes
Scott Piercy (USA) bt Luke Donald (ENG) 7 and 6
Hunter Mahan (USA) bt Richard Sterne (RSA) 4 and 3
Martin Kaymer (GER) bt Rafael Cabrera (ESP) 2 and 1
Ian Poulter (ENG) bt Bo Van Pelt (USA) 3 and 1
Tim Clark (RSA) bt Thorbjorn Olesen (DEN) 3 and 2
Matt Kuchar (USA) bt Sergio Garcia (ESP) 2 and 1
Nicolas Colsaerts (BEL) bt Justin Rose (ENG) 4 and 2