Posted by Mike on January 9, 2014
We've added win probability graphs to every Super Bowl, from I to XLVII, from exciting to not-so-exciting. For years prior to 1999, play times were extrapolated from drive start and end times listed in the NFL Gamebooks for those games. For example, if we know this 8-play Rams drive in Super Bowl XIV started at 7:25 and ended at 3:20 with a touchdown, we estimate that each play took roughly 35 seconds off the clock. These are imperfect estimates (obviously the clock will stop on an incomplete pass or an injury and certain plays take longer to run than others), but they are close enough to allow us to calculate a pretty close approximation of the win probability for that given moment.