(SBQ19SE.9)
A 27-year-old minor league baseball pitcher presents to your office complaining of vague, deep shoulder pain which worsens during the late cocking phase of his throwing cycle. He also reports a recent decrease in velocity. He denies any history of instability. On examination, he has full strength with shoulder abduction, negative empty can test, as well as weakness with shoulder external rotation and resisted cross-body adduction. Radiographs are unremarkable and an MRI is obtained which demonstrates a tear of the posterior labrum with an adjacent paralabral cyst. Given this history, which of the following structures seen on the reference MRI in Figure A would be be expected to be affected?
QID:
216799