Youth Pitcher Fatigue: Medial Elbow Laxity, Ultrasonographic Assessment of Flexor-Pronator Mass Energy Depletion, and Association With Pitch Count. - Schubert MF; Awan TM; Sciascia AD; Figueroa EG; DeMink JM; Selak DM; Snyder CM; Gagnier JJ; Freehill MT (Orthopaedic journal of sports medicine, 2024)