The United States Golf Association announced last year that square or U grooves would be illegal at the start of the 2010 season.

PGA TOUR - NORTHERN TRUST OPEN - Riviera Country Club, Pacific Palisades, California - Phil Mickelson arrives at the Northern Trust Open this week as the two-time defending champion and the focus of recent rules-related scandal.

We forget how good a golfer John Daly used to be. While obsessing over his on-course power, his off-the-course personal problems and his popularity as golf's no-bull everyman, we forget the fact that Daly was a two-time major champion nine years before Phil Mickelson won his first.

With their wins over the weekend, Martin Kaymer and Bill Haas made big jumps in the latest official world golf rankings.