so much for that
Rank the Coaches: Talent Evaluation and Player Development
Evaluating coaches is a tricky thing. Ultimately it comes down to wins and losses but even comparing one situation to another in the unbalanced world of college football is a tricky proposition. Mike Shula has a higher career winning percentage as a head coach than Brady Hoke. However Hoke has spent all but the last year at non-BCS schools where Shula was at Alabama. School prestige, resources and recruiting all play major roles in team success along with coaching. Many of them often go hand in hand but I think I am finding some ways to parse out different pieces of the puzzle independently. This is my first of hopefully many off-season looks at coaches, and who at excels at what parts of coaching.
To evaluate how coaches develop and evaluate talent I needed a way to separate out better inputs (recruits) from the output (team success and draft placement). Team success is a viable way to look at it and at some point I would like to circle back to compare PAN and recruiting for a comparison, but for today’s exercise I am going to look at recruiting ranking to draft position.
The main challenge with this method is that draft placement is such a lagging indicator from recruiting. Since only some of the 2007 recruits and most from 2008 on have yet to be drafted, I am only looking at recruiting classes from 2002-2006.
I have now been able to add all four recruiting services to my database. Since we are only looking at classes up until 2006, that means just Scout and Rivals for all years except 2006 when ESPN came on board, as well. Recruits are given a number value based on national rank, position rank and stars. Each year has 25,000 points assigned across all players so the early years with fewer players have their individual ceilings a bit higher. Consensus 5 star players are typically 50-60 pts. Generic three stars are in the low teens and below. Anyone without a position rank or less than 3 stars is zero points.
Here is Michigan’s 2012 class for reference.
Evaluating Draft Picks
Because of the much higher value to higher draft picks, the draft pick evaluations are fitted using an exponential formula.
This works out to about 500 for the first pick and then each round is half of the same pick in the previous round (1st pick in second round about 250, 1st pick in the third about 125, etc.). This puts the total points for a 255 player draft at 24,600, almost identical to the total for a year’s worth of recruits.
Players are counted towards the coach that recruited them. This will only be somewhat an evaluation of player development since the coach gets “credit” for the player they recruited even if they leave the next year. I have also restricted the search to coaches with at least 1,000 total recruiting points over the five year period. This is about equal to two top 15 classes or five top 50 classes. This gives us 43 qualifying coaches to review.
First thing I did was look at each coach and how many recruiting points they accumulated versus how many draft points they had.
|Rank||Coach||Recruit Pts||Draft Pts||Ratio|
|41||John L Smith||1,187||273||0.23|
The first thing that jumped out at me was that there seemed to be a strong correlation between total recruit points and total draft points. This is going to be true to some extent, but it seemed that ability for the top schools to load up wasn’t properly accounted for. So I plotted the two versus each other and found a very strong correlation was present.
Since we are looking for more on talent evaluators and developers than MOAR 5 stars, I used the correlation between the two to adjust recruiting points to give a more fair comparison between the lower end and the top end. This allows for a more common evaluation tool between elite programs/recruiters and the rest.
|Rank||Coach||Adj Recruit Pts||Draft Pts||Adj Multiplier|
|35||John L Smith||474||273||0.57|
Now we have something to talk about.
One thing that jumped out at me was that NFL guys did seem to have a bit more success. Maybe their buddies were just doing them favors, but there are a lot more guys with NFL experience at the top than the bottom. Oh, except for the big guy coming in last at #43. Weis’s monster class of 2006 (934 team points, my #7 class of the last 11 years) yielded two 6th round draft picks. His first class which was much less regarded still only yielded a single fourth round draft pick. In the words of our fearless leader, #MissYouBigGuyXOXO.
Lloyd Carr comes in just below average on the adjusted scale. Barry Alvarez checks in at #1 among Big Ten coaches and #2 overall. Wisconsin’s lineman machine is real. The evil genius Nick Saban is #3 based on his last three classes at LSU. Ohio coaches new and old round out the top ten.
Of the nine elite recruiters (3,000 or more adjusted recruiting points) Pete Carroll and Jim Tressell come out on top, with Phillip Fulmer close behind. The bottom three are all southern coaches: Bobby Bowden, Larry Coker and Mark Richt. Bob Stoops, Mack Brown and Lloyd Carr make up the middle third.
Ted Roof takes home the prize for most recruiting prize without a single draft pick with 515 points and nothing to show for it. Top performers who missed the cutoff included Dan Hawkins, Bret Beliema’s first class, Ed Orgeron, Mike Stoops and Greg Schiano.
Many thanks to all who have helped populate the recruit database. We are 25% of the way done.
Still have lots of ideas for future posts including the final post on how to use game theory to maximize success based on the overvalued running back and success rates. If there is interest, I would like to do a retrospective on previous seasons through the eyes of advanced analytics and throw up some of the best WPA graphs of the season. Hopefully I can start with 2003 in the next month. I am open to any ideas you have out there, as well.
If you are on the twitters follow me at @the_mathlete. I am trying to post little snippets that aren’t quite column worthy there. Recently I have tweets about which state’s recruits stay in-state the most (Utah and Arkansas) and least (NY/NJ and Hawaii) and used my recruiting points ranking to list the top 4 Michigan high schools in producing 3* or better talent (Cass Tech, OLSM, Detroit Renaissance & FHH), correctly guessed by @Joshua_Block.