Phil Mickelson said he will make "drastic changes" because of federal and California state tax increases.

"It's been an interesting offseason," Mickelson said Sunday after the final round of the Humana Challenge. "And I'm going to have to make some drastic changes. I'm not going to jump the gun and do it right away, but I will be making some drastic changes."

The 42-year-old golfer said he would talk in more detail about his plans – possibly moving away from California or even retiring from golf – before his hometown Farmers Insurance Open, the San Diego-area event that starts Thursday at Torrey Pines.

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