Main Number: (410) 337-7900
UM SJMC Spine Institute:
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Shoulder Motion and Laxity in the Professional Baseball Player

Abstract–“We studied 148 professional baseball players with no history of shoulder problems to assess range of motion and laxity of their dominant and non-dominant shoulders. There were 72 pitchers and 76 position players.

Average external rotation with the arm in 90° of abduction was statistically greater and average internal rotation was statistically less in the dominant shoulders than in the non-dominant shoulders, both in pitchers and position players. There was no statistical difference in forward elevation or external rotation with the arm at the side of the body in either group. Both dominant and non-dominant shoulders of pitchers had greater average range of motion in forward elevation and external rotation (both at the side and at 90° of abduction) and less average internal rotation than those of position players…” Visit the links below to learn more: