Murphy has been with the station for 33 years. He's received such honors as a George Foster Peabody Award in 1984 and a Mitchell V. Charnley Award in 2010 from the Northwest Broadcast News Association.
Murphy told the Pioneer Press that his retirement had nothing to do with an early morning incident last month where he was mugged while jogging to catch a bus to work.
"It's not getting mugged at 2:30 in the morning, it's coming to work at 2:30 in the morning," Murphy told the paper.
Murphy told WCCO Radio that the timing was also right because of a big move by his wife.
"My wife, Monica, retired from her nursing in job in November," Murphy told the station. "I decided to join her after my 33 years at WCCO."
CBS Radio Minneapolis' Senior Vice President and Market Manager Mick Anselmo said Murphy will be "sorely missed" and called the newsman "a wonderful example of a professional radio journalist with a great sense of news, a confident, soothing but direct delivery and an uncompromising work ethic."