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.

Bob Kelso Quotes

Dr. Kelso: You're gonna love it here, sport.
Ted: Get out while you still can.
Keith: Uh...
Ted: Seriously, get out while you still can.

Elliot: And... the reason that I came back here is because you said that Bruce and I are alike. And you know what? You're right. Because you're treating him the exact same way you treated me when I first got here! Dr. Kelso, you only judge us by these, like, twenty-minute, pressure-filled windows that you see us through twice a week, and you-you never get to know us or how hard we really work. Because, if you did, you'd realize that a lot of the times we fail, it's not our fault - it's yours.
Dr. Kelso: Is that how you feel, future dentist?
Bruce: W-well... sometimes you make me feel like... I can't do anything well, and I can do lots of things well!
Dr. Kelso: Like what?
Bruce: I'm a pretty solid human beat-box.
Elliot: Bru-Bruce, I think he was talking about medical... things.

Scrubs Quotes

I'm narcissitic, I'm pessimistic, I'm obsessive, I'm insecure, and I am so afraid of intimacy that every one of my relationships is a journey of self sabatoge that inevitably end in a black vacuum of shattered expectations and despair.

J.D.

Doug wanted me to give this patient five hundred thousand milligrams of morphine. I thought I'd check with you before I kill a man.

Laverne