One of the craziest stats in the NFL is that the Chicago Bears have never had a 4,000 yard passer. NEVER. Their single-season leader is Eric Kramer in 1995 with 3,838. You know you're in trouble when Sid Luckman's 1947 season cracks your top 15 and the top ten is dominated by Jay Cutler. Will Caleb Williams and all these FA/trade weapons break that crazy streak? I kind of hope it doesn't.
Another slightly related fact is that the J E T S Jets Jets Jets have never had a 4,000-yard passer in their NFL history. Joe Nameth had 4,007 in 1967, but those were AFL yards. If those count, then so does the Billa AFL Championship.