If my quick research is correct, Walden is one of only two Iowa State coaches to defeat both Nebraska and Oklahoma.
The other: Clay Stapleton -- who did it in the same season (1960) (Asterisk: An oddity in the historic sense, both NU and OU had losing records that season).
The other: Clay Stapleton -- who did it in the same season (1960) (Asterisk: An oddity in the historic sense, both NU and OU had losing records that season).