I read this on wikpedia anf found it interesting. I only knew of one ball player who recently had TOS: Blalock.

Notable patients
Major League Baseball players Hank Blalock, John Rheinecker, Jeremy Bonderman, and Kenny Rogers have recently been diagnosed with Thoracic outlet syndrome. Kenny Rogers was diagnosed several years earlier with TOS in the other upper extremity. Coincidentally, three of these four players have played for the Texas Rangers. All-Star pitcher J. R. Richard suffered a career-ending stroke from an undiagnosed case of TOS. Pitcher David Cone had a variant case of TOS, with an arterial aneurysm of the upper aspect of his pitching arm.

Overhead athletes, such as swimmers and volleyball players, are known to be predisposed to the development of TOS.

Musician Isaac Hanson suffered a potentially life threatening pulmonary embolism as a complication to thoracic outlet syndrome.[4]