What is the kinetic chain? How does it work with pitchers? Is it important to know? What do we need to know about it? Dr. Chris McKenzie, a board-certified sports & orthopedic physical therapist, goes over these concepts in Part 1 of a three-part (yes, three part) interview. Plus Rob answers the Question of the Week about drills for helping a 7-year-old work on his swing with a tee and net setup.