Dr. Robert "Bob Kelso" is the former Chief of Medicine of Sacred Heart on Scrubs and is played by Ken Jenkins. Although Dr. Kelso is generally portrayed as mean-spirited and heartless, he really is just doing his job as the Chief and is looking out for the hospital's best interests. Now retired, Dr. Kelso still hangs around the hospital and is much more human showing his softer side and ofering advice.
Kelso often refers to his obese wife Enid and his gay son Harrison, though neither have appeared on the show.
Dr. Kelso: Now if any of you other would-be revelers get the urge to dress up on this, the mother of all non-holidays, please consider me the razor blade in your caramel apple. We're professionals, dammit! You know... it's nothing personal, son... you just make me sick.
Doug: He called me son! He called me son!
Intern: That guy needs to do some serious thinking about baseball.
Todd: He wouldn't even let me see it.
Elliot: Hey meathead! Oh good, you both looked. Now, Mr. Gerst came here for help, and we're doctors, so how about we try and treat him with at least a little bit of dignity and respect, okay?
Dr. Kelso: That man is a human sundial!