The Portland Trail Blazers interviewed Terry Porter for their vacant coaching job Sunday, ESPN.com's Marc Stein has learned.

Porter, according to NBA coaching sources, was thus officially added to a Blazer search believed to favor Seattle coach Nate McMillan, with Phoenix assistant Marc Iavaroni also a strong contender.

The Blazers appeared close to offering the job to Iavaroni in late June, with the caveat that they first wanted a shot at luring McMillan away from the SuperSonics. McMillan's previous contract with the Sonics expired Thursday, and the Blazers have since begun their pursuit. The New York Times reported Sunday that Portland is offering McMillan an annual salary of $6 million.

McMillan has a four-year offer on the table from Seattle worth an estimated $18 million, and the Tacoma News Tribune reported Saturday that the lifelong Sonic has been told he has to notify the club by "the middle of next week" if he wants to take the offer or coach elsewhere next season.