The Epidemic > It's the Timing, Stupid > Flat Arm Syndrome > Beyond FAS

For years I have expressed concern about a particularly serious Timing problem called Flat Arm Syndrome (FAS). As I have predicted, pitchers are now starting to show even worse Timing problems, and I believe that is related to the increasing incidence of terrifying problems like Thoracic Outlet Syndrome.

Beyond Flat Arm Syndrome

At Foot Plant, Justin Verlander's pitching arm is UP and at roughly 80 degrees of external rotation going into front foot plant.

Justin Verlander

That contrasts with Ttrevor Clifton's pitching arm, which is FLAT and at roughly 0 degrees of external rotation at foot plant.

Justin Verlander and Trevor Clifton

In contrast, in the pictures below, notice how the pitchers' arms aren't just flat, they are in Internal Rotation at Foot Plant.

Sal Romano

Tyler Thornburg

Although the sample size is small, Dr. Cynthia LaBella has identified a correlation between Internal Rotation at Foot Plant and Pain in young pitchers. Another relevant study is Dr. Wiemi Douguih's study of Timing in baseball pitchers.