I play baseball. i'm feeling shoulder instability and sharp pain at times. could this be a labrum tear?

Possibly: depending on when the "instability" occurs in motion and whether weakness, pain, range of motion limitation, atrophy are associated, helps determine whether one structure or another is affected. labral tears are common in baseball players, however other thingscan also be involved. you should be evaluated by a sports specialist, orthopedist, or physical medicine doctor if this persists.

It could.: You should see a fellowship trained orthopedic sports medicine shoulder surgeon, who can make an accurate diagnosis, and offer you a treatment plan.