Posted by Neil on September 7, 2012
We don't know what this weekend's games will hold, but maybe one of them will end with an historically-unique final score. If so, as a Pro-Football-Reference user you'll know first because you can run a search on any combination of final scores to see how often they've occurred all-time.
Using the main table on this page, and clicking the "count" column header to sort by he number of instances in the database, you can find the rarest and most common scores in pro football history. You might be surprised to see the number of combinations that have taken place just once, running the gamut from 66-0 blowouts to brutal 5-3 affairs. And at the other end of the spectrum, 20-17 is by far the most common all-time final score.
Play around with the tool for a while, and you'll always know where to find an answer when somebody asks, "how often does this score happen?"