Grizz Chapman, who acts as part of Tracy Morgan’s loyal entourage on NBC’s 30 Rock, will announce on the Dec. 15 episode of The Dr. Oz Show that he needs a kidney transplant, reports People. Chapman suffers from severe hypertension, but he must lose 75 pounds before he can become a viable transplant candidate. “Whatever I can do for the longevity of my life, I’m going to do,” he says.