On the Predictive Power of Top 10 Rankings…

Posted by Will Ezekowitz on November 8th, 2016

The college basketball season is right around the corner, but all we have to amuse ourselves until tip-off this Friday night are the myriad published projections and preseason polls. I am a big fan of preseason polls, and have written extensively in the past about both their predictive power and their biases. This year I decided to focus on the preseason and postseason top 10s (note that only the USA Today/Coaches Poll publishes its final poll after the NCAA Tournament has completed). I was curious if there was any continuity between the two and the corresponding likelihood of a team finishing in the postseason top 10 given their inclusion in the preseason top 10.

Duke is Back in the Top 10, But the Blue Devils Didn't Finish There Last Season. Does it Matter? (USA Today Images)

Duke is Back in the Top 10, But the Blue Devils Didn’t Finish There Last Season. Does it Matter? (USA Today Images)

First, a quick note about each poll. A natural first instinct is to dismiss the preseason Top 25 as little more than idle speculation, but it has proven over time to be a useful predictive tool. In a sport with relatively little year-to-year continuity, the projections of the preseason polls are useful proxies for the objective talent of a team, which is notoriously difficult to quantify. The postseason poll (i.e., the poll taken after the conclusion of NCAA Tournament) is functionally irrelevant in college basketball, but it is a good metric of holistic season success. The Tournament exerts its weighty influence on the judgment of those teams, but it seems harsh to factor the entire perception of teams on a few games in March. The postseason Top 25 represents a season-long assessment. For example, Michigan State, a strong #2 seed that many pundits and fans alike projected into the Final Four, shockingly lost to #15 seed Middle Tennessee State in the First Round. The Spartans were therefore ranked seventh in the postseason poll, which ultimately felt about right.

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What Parity?

Posted by rtmsf on January 7th, 2008

Is it just us, or has college hoops halfway through the season been almost completely devoid of big upsets so far this year? Last night’s UNC-Clemson game was exciting on many levels, but it failed to deliver in the one key area that makes the college hoops regular season so great – the big upset (leading to a home team RTC, of course).

RTC

On the Horizon – More of This?

In the aftermath of the wild and wacky college football season that saw several teams out of the national title hunt/back into the picture/out/then in again, as well as some eye-opening early college basketball losses (ahem, Gardner-Webb, Mercer), pundits wondered aloud whether we were in store for another zany hoops season where a new #1 team would last about as long as it takes to hang the banner (sup, Carolina fans).

This may all become completely irrelevant as conference play begins in earnest, but this is one of the quietest pre-conferences we’ve seen in many years. It turns out that the Kentucky loss to Gardner-Diego wasn’t that much of an upset as anyone with a starting five can beat UK this year, and the few other eyebrow-arching intra-top 25 losses (e.g., Texas over UCLA and Tennessee) aren’t what we’re talking about. Don’t agree?

  • Consider that we’re two months into the season and the AP top 10 consists of nine of the same teams as the preseason poll (Louisville has been replaced by Duke).
  • Consider that those preseason top ten teams are a combined 127-9 and four of those nine losses are accounted by Rick Pitino’s injury-prone Louisville squad.
  • Of the five other losses, two of them came against other preseason top tenners (Georgetown against Memphis; Michigan St. against UCLA), and two of them were against Texas (#15 preseason). The other top ten loss was Indiana against Xavier.

So this means one of two things. Either we can expect an oligarchy of about 6-8 power teams this year running roughshod through their respective conferences; or, none of this analysis means a damn thing and we’ll have a brand new top 10 in a couple short weeks of conference play. Let’s lace em up and find out.

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