BASKETBALL OPERATIONS STAFF
A lifelong Celtics fan and season ticket holder, MICHAEL ZARREN is now the Celtics’ Assistant General
Manager and Team Counsel. Now in his 16th year with the team after starting as an unpaid intern, Zarren is
widely recognized as one of the leaders in the field of advanced statistical analysis of basketball players and teams,
and is an important part of the team’s strategic planning and player personnel evaluation processes. Zarren is also
the team’s salary cap expert and lead in-house counsel for basketball issues, and is responsible for the development
of new technologies for team use, including the team’s statistical, sports science, and video database processes.
He previously also served as the team’s in-house counsel for all business-side legal work, including sponsorship
agreements, broadcast deals, and vendor arrangements, among other legal matters.
A graduate of Harvard Law School (where he served as editor-in-chief of the Harvard Journal of Law and
Technology) and of the University of Chicago, Zarren has also served as a law clerk on the United States Court of
Appeals for the Sixth Circuit. Zarren was previously a management consultant for Fortune 500 firms across a wide
variety of industries. A native of Swampscott, MA, Zarren is a member of the bars of New York and Massachusetts,
of the Board of Trustees of The Waring School, and of the Board of Advisors of Voter Choice Massachusetts, a
charity focused on educating people about improvements to our nation’s voting systems.
Assistant General Manager
and Team Counsel
AUSTIN AINGE enters his ninth season with the Celtics as the team’s Director of Player Personnel. Ainge
rejoined the organization after spending two seasons as the Head Coach of the Maine Red Claws of the NBA
Development League (2009-11). Ainge previously worked for the team during the 2008-09 season as a scout. Ainge
has previously worked at Southern Utah University where he was responsible for perimeter players, recruiting,
player development, video breakdown, and developing game plans. Before coaching he had a very successful playing
career at Brigham Young University, where he was a two-year captain and won two Mountain West Conference
Championships. While at BYU Austin went to three NCAA tournaments and one NIT. His senior year Austin
was one of the top three point shooters in the nation and led the conference by shooting .525 from behind the arc
in conference play.
Before playing at BYU, Austin put his basketball career on hold and served a two-year mission for his church, living
in and serving the communities in Santo Domingo, Dominican Republic where he learned to speak fluent Spanish.
Austin is married to the former Crystal Bluth and has three sons, Andre, Finley, and Otto.
Director of Player Personnel
ART HORNE enters his third season as the Celtics’ Director of Performance.
Horne joined the Celtics after spending the previous two seasons as the Atlanta Hawks Head Athletic Trainer.
Horne came to the Hawks from Northeastern University, where he was Director of Sports Performance, with
oversight of the development and care of all varsity student-athletes, while also serving as Head Athletic Trainer
and Strength and Conditioning Coach for the men’s basketball team. Horne holds certifications from both the
American College of Sports Medicine and the National Strength and Conditioning Association. He has also served
as a reviewer for Athletic Therapy Today, the professional journal of certified athletic trainers and athletic therapists,
while continuing to lecture nationally on topics related to the benefits of training barefoot, ankle and foot mechanics,
strength training, and the importance of prevention and integrated care within the sports performance model. He
received his Bachelor’s Degree in Athletic Training and Physical Education with a teacher education certification
from Canisius College (NY), and also holds a Master’s Degree i ART HORNE n Education from Boston University (MEd).
Director of Performance
14 BOSTON CELTICS YEARBOOK 2019–2020