TBL member Hafiz is on a roll! September 30, 2017 Congratulations to Hafiz Rahman, TBL PhD student! Hafiz recently passed his prelim with flying colors and his review paper on the effect of rotator cuff tears on shoulder biomechanics has just come out. Way to go Hafiz! Rahman H, Currier E, Johnson M, Goding R, Wagoner Johnson AJ, Kersh ME. Primary and secondary effects of rotator cuff tears on glenohumeral biomechanics. Journal of Biomechanical Engineering, 2017.