Because he broke his putter in a fit of anger and can't replace it mid-round.
BULLSHIT. The poorer conditions lasted for no more than 9 holes for anyone due to play being suspended so quickly. Most of the guys, even the ones in the tough half of the draw, played only a few holes out of a 72 hole event with the weather being a factor. That's akin to the wind changing direction for ONE BATTER during a baseball game or it raining for 2 plays during a football game. It's an outdoor sport, you man up and play, over the course of a year everyone gets the best of the weather sometime and the worst other times. In this case the players themselves have no complaints about the weather. The only people complaining are the ones who worship Tiger and are trying to blame his poor play on the weather while conveniently or ignorantly forgetting the fact that Tiger's worst stretch of holes, +4 through 4, came during the best part of the weather when everyone else was shooting lights out.