About Our Team
Resident Experts
Mark Verstegen
Founder and Chairman, Athletes' Performance
An internationally-recognized leader and innovator in the world of athletic performance training, Mark Verstegen is the founder of Athletes' Performance and Core Performance.
Craig Friedman
Director of Methodology
As Director of Methodology, Craig Friedman designs and implements performance training systems for professional, collegiate, and elite youth athletes.
Sue Falsone
Director of Performance Physical Therapy
As the Director of Performance Physical Therapy, Sue Falsone provides the critical link between therapy and performance. She develops and implements therapy regimens for athletes at Athletes' Performance.
Amanda Carlson
Director of Performance Nutrition
As a registered dietitian, Amanda Carlson has provided educational seminars and individual counseling to a variety of professional and elite sports organizations.
John Stemmerman
Performance Manager and General Manager
John is responsible for managing all of the departments in the Arizona facility to help deliver a world-class product to each athlete.
Anthony Slater
Head Performance Specialist
As the Head Performance Specialist for Core Performance Centers, Anthony Slater has trained many of the top athletes in the MLB, NFL, NBA, NHL, MLS, PGA and LPGA.
Brent Callaway
Performance Manager
Brent Callaway is the Performance Manager at Athletes' Performance in Los Angeles, California.
Nick Anthony
High Performance Manager
From managing stress with exercise to building a more time-efficient workout, Nick Anthony helps busy executives and athletes of all levels optimize their performance.
Paul Robbins
Metabolic Specialist
As a leading metabolic expert in the industry, Paul Robbins has published articles in Shape magazine, Fitness Management and PTonthenet.com.
Kevin Elsey
Performance Specialist
With three undergraduate degrees from Queen's University in Canada and several years of experience as a personal trainer and Physical Education teacher, Kevin Elsey brings a wealth of educational and practical experience to Athletes' Performance.
Ken Croner
Performance Specialist
Before joining Athletes' Performance as a Performance Specialist, Ken Croner was a strength and conditioning coach at the University of Notre Dame for 5 years, as well as a strength and conditioning assistant with the Green Bay Packers and the Minnesota Vikings.
Masaya Sakihana
Performance Specialist
As a former high-level competitive soccer player, Masaya Sakihana brings a wealth of knowledge and experience to Athletes' Performance as a Performance Specialist.
Nick Winkelman
Performance Specialist
With a degree in Exercise Sports Science from Oregon State University, Nick Winkelman brings a serious passion for sports performance to Athletes' Performance.
Scott Piri
Performance Specialist
With experience in training elite professional soccer players, Scott Piri brings extensive performance training knowledge to Athletes' Performance.
Jennifer Noiles
Performance Specialist
With a background in sports performance and human movement, Jennifer Noiles brings a passion for strength and conditioning to Athletes' Performance.
PJ Stahl
Performance Specialist
Before joining the Athletes' Performance team, PJ Stahl was a member of the men's gymnastic, swimming and diving teams at Michigan State University, as well as a strength and conditioning coach for the MSU athletic department.
Joel Sanders
Performance Specialist
Joel Sanders is a Performance Specialist at Athletes' Performance in Arizona. He trains executive clients and junior athletes of all sports.
Zac Woodfin
Performance Specialist
Zac Woodfin joined the Athletes' Performance team full-time in 2008, with a primary focus in the strength development of NFL Combine athletes as well as the NFL athletes that train with Athletes' Performance in Los Angeles.
Marc Digesti
Performance Specialist
As a graduate of Athletes' Performance's internship program, Marc Digesti is a Performance Specialist at the Core Performance Center in Santa Monica.
Simin Levinson
Performance Nutritionist
As a performance nutritionist, Simin Levinson focuses on working with executives in the High Performance Programs at Athletes' Performance.
Megan Mangano
Performance Nutritionist
Before joining Athletes' Performance to work with athletes to ensure proper nutrition for optimal performance, Megan Mangano played NCAA Division 1 lacrosse at UNH.
Bob Calvin
Performance Nutritionist
Bob works at Athlete's Performance in Gulf Breeze, Florida, and contributes to CorePerformance.com with insights on nutrition, including supplements and meal timing.
Denise Barry
Performance Nutritionist
As a registered dietician, Denise Barry focuses on ensuring proper nutrition for optimal performance
Sara Snyder
Performance Nutritionist
Sara Snyder has served as an athletic trainer for the Santa Clara University women's soccer team, as well as a strength and conditioning coach for the Riekes Center in Menlo Park, California.
Danielle LaFata
Performance Nutritionist
As a Performance Nutrionist at Athletes' Performance in Phoenix, Arizona, Danielle LaFata delivers nutritional counseling and education to both athletes and the general population.
Debbie Martell
Performance Chef
As a graduate of the Culinary Institute of America, Debbie Martell applies her 14 years in the restaurant business with a Nutrition and Dietetics degree from Arizona State to provide nutritional plans to elite and professional athletes.
Karen Bedel
Sous Chef
Karen joined the Athletes' Performance team in October 2008, and brought with her more than 30 years of restaurant business experience.
Jennifer Lewis
Performance Physical Therapist
With degrees from Oregon State University and the Arizona School of Health Sciences, Jennifer Lewis brings extensive experience to her position as a Performance Physical Therapist at Athletes' Performance.
