Phil Mickelson gets back treatment

— -- SAN DIEGO -- Phil Mickelson reported through a spokesman Friday morning that he had received treatment on his aching back and would attempt to play the second round of the Farmers Insurance Open.

Mickelson, who is coming off a tie for second last week at the European Tour event in Abu Dhabi, seemed in obvious discomfort after several shots during a 3-under-par 69 on the North Course at Torrey Pines.

The five-time major winner reported that his back "locked up'' and that "it's just tight and I just couldn't swing from the top. It just kept locking up and giving me a shooting pain. I kind of flinch.''

Mickelson, 43, has captured three of his 42 PGA Tour titles at this tournament, the most recent in 2001. He is scheduled to defend his title next week at the Waste Management Phoenix Open and is also committed to the following week's AT&T Pebble Beach National Pro-Am.