tackler's exostosis

tack·ler's ex·os·to·sis

(tak'lĕrz eks'os-tō'sis)
An exostosis of the anterolateral humerus due to repeated blunt trauma, as suffered in contact sports, especially American and Canadian football, where the injury occurs during blocking maneuvers.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012