From his mailbag column up now at SI.com: To Will of Lake Worth, Fla., You wrote such a nice thing about my work that I will get out my history book and do a research project for you. The question: "Who is the weakest head coach to win a Super Bowl in the last 20 years?" Hey, wait a minute, who needs a book? This is an easy one. Barry Switzer. And you could replace 20 years with "ever."