Free agent Matt Hasenbeck is shown here working on a deficiency all too common in baseball players.
His psoas is extremely tight causing an anterior pelvic tilt which pulls his hips downward on the front side of his body.
This limits rotational power and range, as well as limits his ability to pull his hips through movements completely and use his glutes at optimal levels.
In addition it over stretches the hamstrings making them weak and atrophying, and renders them incapable of activating to complete forward propulsion … a huge issue for rotational athletes.
Simple fix: place a roller or small med ball under them small of the back to create a levering effect between the pelvis and the abdomen and stretch the tight psoas from the inside of the iliac crest (hips).