Coach Trees / Coaching Pedigrees - Searching the relationships between coaches
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Coach Trees was founded in 2009 with the intent of using software to document the relationships between coaches.
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Current selected organization: Buffalo Bills
Organization Active years

Number of head coaches 17
Total number of coaches 168
Average Tenure 3.60 years

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Buster Ramsey                                                      
Lou Saban                                               
Joe Collier                                                     
Harvey Johnson                                                      
John Rauch                                                      
Jim Ringo                                                      
Chuck Knox                                                   
Kay Stephenson                                                     
Hank Bullough                                                      
Marv Levy                                            
Wade Phillips                                                     
Gregg Williams                                                     
Mike Mularkey                                                      
Dick Jauron                                                    
Perry Fewell                                                       
Chan Gailey                                                     
Rex Ryan                                                       

CoachPosition
Dick Jauron Head Coach
Bobby April Assistant Head Coach
George Catavolos Defensive Backs
DeMontie Cross Defensive Assistant/Special Teams Assistant
Perry Fewell Defensive Coordinator
Sean Hayes
Chuck Lester Coaching Operations
Matt Sheldon Linebackers
Tyke Tolbert Wide Receivers
Alex Van Pelt Offensive Quality Control
Eric Studesville Running Backs
Bill Kollar Defensive Line
Larry Zierlein Offensive Line
John Allaire Strength and Conditioning
Charlie Coiner Tight Ends
Steve Fairchild Offensive Coordinator
Jim Mcnally Offensive Line
Turk Schonert Quarterbacks