With one week left until the start of the Torrey Pines tournament, the San Diego Open has found a title sponsor.

The PGA Tour said Monday that Farmers Insurance Group, a subsidiary of Zurich Financial Services, has signed on to be the new title sponsor with an option to extend the deal beyond 2010.

The tournament, formerly the Buick Invitational, will be called the Farmers Insurance Open when it begins Jan. 28.

This is the fourth new title sponsor the PGA Tour has signed up in the last two years. Former sponsors include Waste Management (Phoenix), SBS (Kapalua) and The Greenbrier (West Virginia).

San Diego is the first PGA Tour event of the year that is broadcast on network television.