After enduring billionaire power plays, broken promises and the team's worst season, Seattle lost its first big-time sports franchise.

NBA owners on Friday approved the Sonics' move to Oklahoma City. The last two votes on moves -- the Hornets from Charlotte to New Orleans and the Grizzlies from Vancouver to Memphis -- passed by a combined vote of 59-1.

NBA Commissioner David Stern says there were only two votes against he move at today's meeting in New York -- Mark Cuban of the Dallas Mavericks and Trail Blazers owner Paul Allen.

Gov. Gregoire says this is a "sad day" for basketball fans in Washington. She says the NBA vote to move the Sonics to Oklahoma City is especially frustrating in light of recent revelations that owner Clay Bennett did not make a good faith effort to keep the team in Seattle.

In filings in federal court in Seattle, owner Clay Bennett's ownership group for the Sonics says the city has participated in "significant duplicity" by not revealing the full price of projected renovations for KeyArena.

The motion states the deception was to gain public and political support for an 11th-hour renovation plan valued at $300 million by a group led by Microsoft CEO Steve Ballmer to keep the Sonics from moving to Oklahoma City.

Seattle's Mayor Greg Nickels says the city is focused on litigation. The city already has rejected an offer from Sonics owner Clay Bennett for $26 million to settle the team's lease agreement, which runs through 2010.

There are three-prongs in the legal fight against Bennett and his partners:

-- A trial, set to begin June 16, in which the city is trying to force the team to play out its KeyArena lease.

-- A class-action lawsuit brought by season-ticket holders who say they were duped into buying tickets under the premise the Sonics wouldn't leave.

-- Former team owner Howard Schultz's new plans to sue to get the team back. SuperSonics-Quality Jobs

A tax incentive package designed to help lure the Seattle Sonics to Oklahoma City was also approved by the Oklahoma legislature. Gov. Brad Henry signed the bill Thursday.

Bennett and other members of his ownership team had intensely lobbied legislators to approve the measure.

Sonics officials have suggested that the team's relocation might not be approved without the tax package.