A few weeks ago, we came across a very impressive list of D-I men’s basketball coaching tenures at D1scourse, compiled by Patrick Stevens. Of course, some coaches have been at their schools forever, while many younger guys are just starting to cut their teeth in the field.

Earlier this week, we once again saw the same data, this time presented in some amazing infographics. John Zhu is currently the assistant director of communications for the UNC Eshelman School of Pharmacy, but likes to dabble in freelance projects in his spare time. He also found Stevens’ research fascinating, and decided to turn the data into some visually appealing charts and publish them on his blog at John-Zhu.com.

John gave us permission to republish the infographics — and they are really, really cool.

Without further ado, here are the visuals

(We also have a PDF version that you can check out)

We figured we’d start by comparing the tenures of coaches in the same conference — here’s how the six major basketball conferences stacked up (keeping the Big East as it was in 2012-13):

The ACC, pictured right, is first. (Click to enlarge.)

The conference charts are very interesting — not only do they list the coaches in order of tenure served at their respective schools, but also the percentage of total conference tenure each coach makes up. For example, Mike Krzyzewski’s time spent at Duke makes up roughly 43% of total ACC tenure — quite impressive.

The leaders of the other five “power” conferences are: Rick Barnes at Texas (Big 12), Jim Boeheim at Syracuse (Big East), Tom Izzo at Michigan State (Big Ten), Lorenzo Romar at Washington (Pac-12) and Billy Donovan at Florida (SEC).

There are some surprises in the data as well. For example, it’s amazing to think that Leonard Hamilton is the second-longest tenured coach in the ACC – ahead of even Roy Williams. Another surprise is that Mike Brey is the second-longest tenured in the Big East.

We’ve included links below to every conference so you can see how your coach stacks up to his competition.

(Click to Enlarge)

So you’ve now seen how some of the longest tenured coaches can account for an insane percentage of a conference’s total tenure — up to 54% in the case of Ron Cottrell of the Great West. Another way to show how impressive some coaching tenures are is to compare them to their conference counterparts.

The chart below shows the average tenure of a coach in each conference on the left-hand side. On the right, you can see what the average drops to if you omit the longest tenured coach from the calculations. To keep with the Coach K example, he has been coaching at Duke for 10,497 days longer than the average ACC coach right now. That means he brings the conference average up by 875 days — or nearly three years.

Where does your school’s coach fit among the rest on a national level? Here’s a pretty interesting look at the mean and median length of coaching tenures. You can also look at what Zhu has dubbed the ‘Coaching Tenure Spectrum’, which places coaching tenures on a curve, in several year blocks:

(Click to Enlarge)

Lastly, have you ever seen a graph with 351 different coaches? It turns out that the current cast of college basketball coaches takes up quite a bit of space — here’s what it looks like when we scale it down so it would fit on one page:

Of course, that’s brutally small. Thankfully, we have a PDF version that you can check out (WARNING: it’s awesome), along with larger versions of all of the fantastic visuals.

To cap it all off, here are few interesting tidbits about the numbers, courtesy of Patrick Stevens, the original researcher:

* A quarter of all Division I head coaches have been on the job for less than 15 months. * Rising true seniors — those who entered school in the fall of 2010 — at 147 of 351 Division I programs have experienced coaching changes since their arrival. That’s 41.9 percent of all Division I schools. * Rising true seniors who signed letters of intent in November 2009 at 195 of 351 Division I schools (55.6 percent) have seen a coaching change since formally agreeing to play for a program. * Only two power conference coaches are five years into their current tenure without an NCAA tournament bid: Stanford’s Johnny Dawkins and Oregon State’s Craig Robinson. Only three (Dawkins, Robinson and Washington State’s Ken Bone) are four years into their current tenure without an NCAA appearance. * Jim Boeheim (37 seasons) and Mike Krzyzewski (33 seasons) have worked a combined 70 years at their current schools. That’s as many seasons (full or partial) as the last 101 coaches on the tenure list put together.

Once again, a huge thank you to John Zhu for the original work.