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

Jordan: And why are you limping?
Dr. Cox: Fishing? I'm limping from fishing.
Dr. Kelso: I know that limp.
Dr. Cox: No, Bob. Bob, no.
Dr. Kelso: You just got a vasectomy! I had mine done back in '68. Ironically, that was the same year that Enid discovered pasta and I discovered I'm not attracted to enormous women.
Dr. Cox: I didn't just get a vasectomy.
Dr. Kelso: Come on, soldier! If I have to force you to drop your pants, I will! So, tell Bobbo, was it a hard decision for the two of you to make?
Dr. Cox: Yeah, we... we really... struggled... with it.
Dr. Kelso: I don't really care.

You have no idea how many times I've been out late and had to pass on my seventh drink. No more Mr. Responsible.

Kelso

Scrubs Quotes

Lucy: If you want to keep sleeping with me I expect you to have my back.
Turk: God, you have so many rules. Get back, listen to you when you talk, stay out of your purse. Damn girl, quit playing games.

J.D.: Should we get out of here?
Molly: D'you think you can handle it?
J.D.: No. But you won't know until after.