The Nets have officially extended a one-year qualifying offer to Brook Lopez, making him a restricted free agent, GM Billy King confirmed today (Twitter link via Stefan Bondy of the New York Daily News). Because Lopez met the starter criteria, as defined by the CBA, his qualifying offer will be worth around $4.39MM.
The big man could choose to accept the one-year offer and become an unrestricted free agent next summer, but he's far more likely to sign a multiyear deal this offseason. Having tendered the qualifying offer, the Nets will have a three-day window to match any offer sheet Lopez signs.