Episode 3: Sean McGrath Seattle Mariners Double-A Pitching Coach

This week on The 90th Percentile Geoff Pontes sits down with Sean McGrath current Double-A Pitching Coach of the Seattle Mariners. We discuss Sean's beginnings as a collegiate pitching coach, his time at Elon University and his time with Seattle. Later in the episode we dive into velocity training and how Seattle has helped their minor league pitchers develop.