Frank Welker's connection with Scooby Doo spans decades. Like most of actors that have brought the Mystery Inc. gang to life, you have probably never heard the name Frank Welker. Trust me, you know his work. Beginning in 1969, he provided the voice of Fred in the original series and continued doing so through 1984. He resumed that role in 1998 and continues through the present. Except for A Pup Named Scooby Doo series and the two live action films, Welker has always been the voice of Fred Jones. Welker also provided the voice of Scooby Doo in the series and animated movies since 2002 and the voice of DynoMutt.
Even though he was not the voice of Scooby or Fred, he still had a role in the Pup Named Scooby Doo series. In that series, he provided voices for various episodic characters like Computer, Mail Order Termite, Mr. Boo, Skipper the Dolphin, RoboPup, and more.
Welker's work as a voice actor, like that of Don Messick, can only be described as prolific. He has worked on hundreds of films and series and provided the voices for generations of fans. In addition to Fred and Scooby, he has provided the voice for other beloved characters such as Curious George, Tom and Jerry, Garfield, Dino (from the Flintstones) and several Smurfs and Transformers.