Untrustworthy: Caveat Emptor on These 10 Teams
Posted by Will Ezekowitz on March 14th, 2018Preseason rankings — they are, in most sports, completely irrelevant when the postseason rolls around. But not in college basketball. When projecting Final Four teams, as we have covered in this space before, the preseason AP Poll is just as predictive as the current AP poll. The rationale for this is that preseason rankings account for things that the mathematical models struggle with (for example, coaching changes, big recruiting classes, injuries and suspensions, etc.), making them a surprisingly accurate projection system. So what about the handful of teams each year that are excluded from these rankings but go on to do great things in the regular season? Is it safe to assume that if you can’t crack the preseason Top 25, you won’t cut down any nets in March?
To answer this question, I looked at historical NCAA Tournament teams that were unranked in the preseason but were ranked in the final regular season poll (this one) to examine whether they came crashing down to earth when it mattered most. My findings indicate that these teams have in fact underperformed as a group in the NCAA Tournament. Since 2007, 106 teams fit the criteria. Just 37 of that group (35%) exceeded their seeds’ average win expectation (based on average wins for each seed since 2002), and the group as a whole won just 120 games. That mark is 30 below an expected aggregate total of 150 victories, a statistically significant difference at the five percent level. Furthermore, just one of 51 top-four seeds ultimately made the Final Four (Kemba Walker’s 2011 Connecticut squad), although they have collectively produced 11 Elite Eight appearances with Florida‘s run last year being the most recent example. The conclusion here is that, although a handful of teams in this group may turn out to exceed expectations, it is likely as a whole to underperform.