Elbow pain after throwing
Also Known As: Little Leaguer's elbow, medial elbow pain, UCL stress, throwing elbow, medial apophysitis
What It Feels Like
Pain on the inside of the elbow during or after overhead throwing
Often worse during the acceleration or follow-through phase of throwing
May feel like a sharp ache, tenderness to the touch, or weakness in the throwing arm
In youth athletes, can be associated with decreased velocity or loss of control
Why It Happens
Throwing creates significant stress on the inner elbow with every repetition. In youth athletes whose growth plates are still open, this load can cause apophyseal irritation. In older athletes, it more often involves the UCL, flexor-pronator tendons, or ulnar nerve.
Common Causes of Elbow Pain After Throwing
🔹 Medial Apophysitis (Little Leaguer's Elbow)
In skeletally immature throwers, repetitive valgus stress during throwing can irritate the medial epicondyle growth plate.
🔹 UCL Stress or Sprain
The ulnar collateral ligament stabilizes the inside of the elbow during the acceleration phase of throwing. Overuse or high pitch counts can strain or partially tear this structure.
🔹 Flexor-Pronator Muscle Overload
The muscles on the inner forearm are under high eccentric load during deceleration, and fatigue or volume spikes can cause tendon irritation at the elbow.
🔹 Throwing Mechanics Breakdown
Poor hip-trunk rotation, early trunk opening, or dropping the elbow below shoulder height increases valgus stress on the medial elbow with every throw.
🔹 Pitch Count and Fatigue
Throwing through fatigue — especially at high speeds — dramatically increases elbow injury risk in youth athletes.
Did You Know?
The medial elbow experiences a valgus force during throwing that can approach or exceed the tensile strength of the UCL in youth pitchers. That's why pitch counts and rest days aren't just rules — they're protective thresholds based on tissue capacity.
How Zenith Can Help
At Zenith, we evaluate throwing athletes from head to hip to hand. Mariel Hammond and Jenn Randall have experience working with youth field and overhead sport athletes, and we look beyond the elbow to assess shoulder mobility, scapular control, trunk rotation, and hip mechanics — all of which affect medial elbow load during throwing.
We help young throwers return to sport with better mechanics, stronger supporting structures, and a load management plan that protects the elbow long term.
Next Steps
Elbow pain in a throwing athlete — especially a young one — should never be ignored. Early evaluation can distinguish between muscle fatigue and structural stress, and getting it right the first time avoids longer-term damage.
Eugene's youth baseball, softball, and lacrosse seasons often overlap with spring conditioning. Athletes doubling up across sports without adequate rest between high-throw-count sessions are at significantly higher risk. If your athlete complains of elbow soreness after games or practice, rest them from throwing and get an evaluation before the next game.