Behind the Steel Curtain, a Pittsburgh Steelers community

I found this column by Kerry Byrne interesting, as usual. What I did find fascinating is that, out of his top 25 PRD teams ever, only the 1975 Steelers made it, out of all six Lombardi championships in team history. The topic of the column being that PRD is a somewhat accurate prediction (56% since 1940) tool for championships, the author still does not address this apparent discrepancy. Another interesting tidbit: the 1975 Bengals appear at no. 9 on the list, but, having lost to no. 6 Steelers twice that year, they did what we can always expect from any Bungles team in history...