DESTIN, Fla. — Nick Saban often finds himself watching an NFL game, seeing a flag thrown and wondering why, like the rest of us. Seconds later, when a retired official appears on the TV broadcast, he gets his answer. He wants the same for the SEC. “Half the people don’t even know the rule. With the difference between college and the NFL, I’m not certain of what the rule is,” says Saban, entering his 13th season as Alabama head coach. “If we could find the right person to do that, an expert who nobody thought had bias, who could explain these things while they happen, I think it would go a long way in at least starting the chain of communication.