17 Co. is a baseball performance brand founded by current professional baseball players John Nester and Casey Harman.  John and Casey came out of retirement last season and had their best seasons to date using the same training methodology they use to train their athletes with 17co. 

Our goal is simple.  We are here to help you #DominateThePlate. 


John Nester - Head of Player Development, (ISSA-Certified Trainer, Nutrition Specialist) 

John has been playing or coaching at the professional level since 2010 after being drafted out of Clemson by the Oakland Athletics.  He has since spent time playing throughout many different levels of minor league baseball as well as spent two years as the Minor League Catching Instructor for the San Diego Padres (2016,2017).  John has a passion for training athletes and specializes in developing hitters and catchers.  He has seen a long list of players he helped along the way reach the collegiate/professional level and has worked with catchers from little league to the major leagues.



Casey Harman - Head of Player Development