No correlation between grip strength and blood flow at rest. Strong correlation (r=.67) in provocative position mimicking late cocking. Even asymptomatic pitchers showed this link. Dead arm might not be fatigue, it could be vascular compromise reducing forearm flexor function.

Grip strength connects to forearm flexors that stabilize the UCL. If blood flow is compromised during throwing, these muscles can't function optimally, increasing reliance on passive structures. 19% of TOS athletes are baseball players. Subclinical vascular issues may be widespread.