<span style="text-decoration:line-through">Marty Lyons from Alabama was inducted last year. There is some ridiculous rule that says a school can't have inductees in consecutive years.</span>
Redact that. That rule no longer exists
According to this, it's somewhat of an unwritten rule:
The National Football Foundation is the organization that manages the College Football Hall of Fame. And according to a person with ties to the NFF, the Honors Court panel that has the final say on the selections “rarely takes players from the same school in back-to-back years.”