Seattle Grace is down one other physician: Justin Chambers, who has performed Dr. Alex Karev on the long-running drama ”Grey’s Anatomy,” is exiting the collection. ABC spokesperson Janet Daily confirmed the information Friday, as did the actor in a press release to USA TODAY, issued by rep Stephen Hirsh. “There’s no good time to say goodbye to a show and character that’s defined so much of my life for the past 15 years,” Chambers’ assertion learn. “For some time now, however, I have hoped to diversify my acting roles and career choices. And, as I turn 50 and am blessed with my remarkable, supportive wife and five wonderful children, now is that time,” the assertion