Question: Hardy Brown is one of only two men to play in the NFL, AAFC and AFL, but which Oklahoma college did he play football for?
Sentence (from "Hardy Brown"): Hardy Brown (May 8, 1924 – November 8, 1991) was an American football linebacker in the National Football League (NFL), All-America Football Conference (AAFC), and the American Football League (AFL).
Relevant evidence: No