Born to Raymond and Marie Didinger, and raised in Folsom, Pennsylvania, Didinger graduated from St. James High School in 1964. He received a B.S. in Communications from Temple University in 1968. His nickname was Nauga, after the animated character used in commercials for Naugahyde. Ray spent four years doing sports radio for WRTI and served as the station's Sports Director..

Didinger co-authored The Eagles Encyclopedia with Robert S. Lyons in (2005). Along with Don Shula, he authored Football America: Celebrating Our National Passion. (1996). He also wrote The Super Bowl: Celebrating a Quarter-Century of America's Greatest Game in 1990 and co-wrote The Ultimate Book of Sports Movies with Philadelphia radio personality Glen Macnow in 2009.

Ray Didinger co-hosts (with Glen Macnow) a popular radio show every Saturday from 10 a.m. to 1 p.m. on WIP-AM in Philadelphia. The show has Didinger and Macnow discuss all aspects of what is going on in Philadelphia sports at the current time. It is also common to hear the two talk about movies, since both are avid movie fans.

Didinger covered the National Football League for the The Philadelphia Bulletin and The Philadelphia Daily News for more than 30 years. He was named Pennsylvania Sportswriter of the Year five times by the National Sportswriters and Sportscasters Association. In 1995, he won the Dick McCann Award for long and distinguished coverage of pro football, and his name was added to the writers' honor roll in the Pro Football Hall of Fame in Canton, Ohio.

Didinger is currently a full-time member of csnphilly.com, writing articles and appearing on-air in a variety of roles, most prominently in Eagles Post Game Live. Previously, Didigner was a senior producer with NFL Films in Mount Laurel, New Jersey until he was bought out of his contract in February 2009. He has won four Emmy Awards for his work as a writer and producer on the weekly series NFL Films Presents and the Turner Network documentary Football America.

Didinger is married to Philadelphia magazine restaurant critic Maria Gallagher.