Gilbert Arenas, who is the most coveted player left on the free-agent market, signed a six-year offer sheet with the Washington Wizards on Monday night believed to be in the $65 million range.

"He has signed the (Wizards') offer sheet," Dan Fegan, Arenas' agent, told ESPN.com.

Because Arenas is a restricted free agent, the Golden State Warriors have 15 days to match the offer. But the Warriors would have to move at least three players, without taking back any salary, to get far enough under the salary cap to match the Wizards' offer.

As a team over the cap, Golden State is helpless to counter any offer with a starting salary exceeding the league average of $4.9 million.

Washington and the Los Angeles Clippers pounced on the Warriors' limitations by making offers in the $60 million range, and Arenas was thought to be leaning toward signing with L.A. -- given his oft-stated preference for living on the West Coast.