The New Zealander, who has been Woods' caddie for 11 years, said he would have "blown the whistle" if he had known about the player's behavior.
"If the shoe was on someone else, I would say the same thing. It would be very difficult as a caddie not to know but I'm 100 percent telling you, I did not know, and that's that," he said. "I'm a straight-up sort of person. If I had known something was going on, the whistle would have been blown."
Williams said he was angry when revelations about Woods' private life emerged, but had not berated the player because he felt he needed a friend.
"Of course I'm mad at him, why would you not be?" Williams said. "I'm close with his wife and he's got two lovely children and he's let them down.''
Meanwhile, golf great Jack Nicklaus said "it would surprise me" if Woods does not play at the Masters next month. Nicklaus said he thinks Woods will play in a tournament before the Masters to get ready for the major he has won four times. A person with knowledge of Woods' schedule told the Associated Press on Tuesday that Woods returned to his home near Orlando, Fla., over the weekend after a week of family counseling and resumed practicing for the first time in nearly 4 months.
Soccer
* The United States lost to the host Netherlands, 2-1, in the Americans' last match before coach Bob Bradley picks his World Cup roster. Dirk Kuyt converted a penalty kick in the 40th minute after Jonathan Bornstein pushed Wesley Sneijder in the penalty area. Kuyt sent his kick to the right of goalkeeper Tim Howard, who dived the other way. The U.S. has lost its last five matches in Europe. The Americans are off until May 25, when they play the Czech Republic at East Hartford, Conn. They face Turkey 4 days later at the Linc.
* The United States beat Germany, 3-2, in Faro, Portugal, to capture the women's Algarve Cup for the seventh time.
Philly File