Otoshi K. The prevalence and clinical characteristics of medial epicondyle apophysitis in juvenile baseball player - ultrasonographic assessment of 2,926 cases. Orthopaedic Journal of Sports Medicine. 2016;4(7 Suppl).
O'Connor F. ACSM's Sports Medicine: A Comprehensive Review. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins; 2012.
Patel P. (2011). Occult and subtle injuries of the pediatric elbow: Pearls and Pitfalls. OKOJ, 9(7).
Regular season pitching rules. Little League. https://www.littleleague.org/playing-rules/pitch-count. Accessed December 2018.