Tommy John Surgery Rehabilitation Recovery Team Management Player Performance Line Drive Line Drive Injuries Head Injuries Prevention MRI Elbow Injuries Ulnar Collateral Ligament Surgery Arm Injuries Facial Injuries Medical Attention Facial Fractures Follow-up Tests Return to Play Protective Gear Medical Treatment Knee Injuries Finger Blisters Surgery Strained Throwing Shoulder Tommy John surgery Shoulder Injury MLB Initiatives Causes Elbow Back Tightness Jacob deGrom Elbow Damage Pitch Clock Pitch Count Minor League Updates Head Fractures Game Strategies Replacement Flexor Strain Recovery Time Comparison to Similar Injuries Concussions Medical Opinions Player Transactions Medical Diagnosis Hamstring Strain Health Concerns