SAN DIEGO -- Phil Mickelson is skipping the Match Play Championship next month in Arizona while he takes his kids on a vacation that was postponed because of his wife's cancer treatment.
Depending on the return of Tiger Woods, it could be the first time the 64-man field at the Match Play Championship is missing its two biggest stars when played in the United States.
The Match Play Championship is Feb. 17-21 outside Tucson, Ariz.
Mickelson said his wife, Amy, is responding well to breast cancer treatment and the long-term prognosis is good. He says medical procedures got in the way of previous vacations, and their three children are on spring break the week of the event.
Mickelson, the No. 2 player in the world, said other parts of his early schedule also might be affected.
Also on Wednesday, Mickelson weighed in on the USGA's new regulation that bans square grooves, contesting some players' view that using the Ping wedges are violating the rule's spirit.
"I've sent in grooves that are legal but have not been approved for play," said Mickelson, who's become the latest player to put the Ping-Eye 2 lob wedge in his bag. "And I feel like the Eye-2 grooves are not legal, or don't conform, but they are approved for play. And after talking about it to the tour and the USGA, the only thing that matters is, 'Are they approved for play?'
"So I don't feel that there's any problem if I were to play those clubs or if anybody else were," Mickelson said. "All that matters is that it is OK under the Rules of Golf."
Information from The Associated Press was used in this report.