Bob McKay is Quagmire's realtor in a flashback in "First Blood".
As he faces getting old, Quagmire notes that he only gets Christmas cards from his realtor and car salesman, leading to a flashback of Quagmire buying his home and changing it as time passes, while he still receives Christmas cards from his old realtor, Bob. Eventually, an elderly Quagmire receives a Christmas card from a new young African American woman who has replaced Bob, who has passed away after being shot while having sex with another man's wife.