Known for his loud sport coats, Walden did play-by-play for USC football and men's basketball from 1966-72, then moved across town to call UCLA games for the better part of 18 years. He was the first person to serve as the broadcast voice of both schools. Walden was at the microphone when the Trojans appeared in five Rose Bowls and won national football championships in 1967 and 1972. He was enshrined in the Southern California Sports Broadcasters Hall of Fame in 2003.