Jason "JJ" Killen

Certified Corrective Exercise Specialist

JJ brings a strong athletic and academic background to Sarge Athletics. He earned his Bachelor’s degree in Sports Management from Wilmington University, where he also competed as a collegiate baseball player for five years as a first baseman, including a red-shirt year after tearing his ACL.

A lifelong fitness enthusiast and coach, JJ has years of experience working with youth baseball athletes and helping individuals of all ages improve movement, performance, and overall fitness.

He completed Sarge Athletics’ rigorous mentorship program while earning certifications through the National Academy of Sports Medicine (NASM), becoming both a Certified Personal Trainer and a Certified Corrective Exercise Specialist (CES).

JJ specializes in corrective exercise, with a strong ability to identify muscle imbalances and support post-rehabilitation clients as they safely return to training and the activities they enjoy.

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