The Parent’s Guide to Valgus Extension Overload (VEO)

My son’s elbow hurts in the back, not the inside. What is going on?

The classic "Tommy John" injury occurs on the inside crease of the elbow where the UCL lives. If your son's pain is localized strictly to the backside of the joint, it points directly toward posterior elbow impingement—clinically defined as Valgus Extension Overload (VEO).

During the pitching motion, the elbow joint undergoes extreme, repetitive stress. While everyone focuses on the structures trying to hold the inside of the arm together, the back of the arm is absorbing massive compression forces. VEO occurs when the bony tip of the elbow (the olecranon process) jams into its corresponding socket (the olecranon fossa) at high speeds.

Why does his elbow only hurt at the very end of the throw when his arm snaps straight?

To understand why this pain hits at the exact moment of ball release, we have to look at throwing biomechanics.

During the acceleration and deceleration phases of a pitch, the elbow extends at an astonishing rate of over 2,300 degrees per second. As the arm snaps straight to release the ball, the muscles in the front of the arm (like the biceps) and the muscles surrounding the shoulder are supposed to act as an "eccentric brake" to safely slow the arm down.

The Deceleration Deficit

If your son has a weak shoulder, poor periscapular stability, or structural fatigue from the travel ball circuit, his braking system fails. According to research by Fleisig et al. published in the Operative Techniques of Sports Medicine, when the eccentric decelerators of the shoulder and arm are weak, the elbow is forced to hyper-extend under extreme velocity.

Without muscular control to catch the arm, the two bony segments in the back of the elbow hit each other. That repeated, high-speed pinching is exactly what causes the sharp, focal pain your son feels the moment the ball leaves his hand.

He says it feels like his elbow is jamming or clicking in the back. Could it be a bone spur?

Yes, it absolutely could be. In fact, if he has been throwing through this discomfort for a while, a bone spur is highly probable.

When the tip of the elbow continuously jams into the back socket throw after throw, the body tries to protect itself from the repetitive trauma by laying down extra calcium. Over time, this forms an olecranon bone spur.

As that bone spur grows, it reduces the physical space inside the back of the joint, causing the elbow to feel like it is "jamming" earlier and earlier in his throwing.

A study by Andrews et al. on elite throwing athletes notes that chronic VEO frequently leads to fractures of these bone spurs. If a small piece of that spur breaks off, it becomes a "loose body" floating freely inside the joint space. If your son describes a sudden, distinct clicking, popping, or a sensation where his elbow completely locks up and refuses to straighten, that is a clear clinical indicator of a floating loose body.

We thought he had a Tommy John issue, but the doctor mentioned extension overload. How are they connected?

This is where sports medicine gets intertwined, and why a generic physical therapy checkup won't cut it for a competitive pitcher. The inside of the elbow (the UCL) and the back of the elbow (VEO) are structurally tethered.

When a pitcher has subtle, underlying laxity (looseness) or a micro-strain in his UCL, the inside of the elbow joint opens up wider than it should during the layback phase of throwing. When the inside opens up too much, it forces the bones on the backside of the elbow to wedge together with significantly higher valgus force.

This can cause a little confusion. Even if your son is not feeling any pain on the inside part of his elbow, it is good to get a thorough examination, as the UCL could potentially be an issue.

Can we treat this pain at your Westfield and Noblesville clinics without shutting him down for the summer?

It is absolutely possible to treat and resolve VEO without a complete, season-ending shutdown—provided you catch it early.

• The Early Stage: If your son only feels this sharp pinch late in games (say, the 3rd or 4th inning) or only on high-intent fastballs, we can usually implement an active return-to-sport recovery track. We can modify his throwing volume, and keep him playing catch or playing an infield position while we fix the underlying issue.
• The Delayed Stage: If you ignore the warning signs, mask the pain with heavy doses of ibuprofen, and force him to throw through the jam, that minor impingement will rapidly evolve into large bone spurs, loose bodies, or a structural UCL failure. Once you reach that threshold, a complete shutdown or orthopedic surgery becomes unavoidable.

Our clinical protocol focuses entirely on fixing the root biomechanical deficits that caused the overload in the first place:

1. Restoring Shoulder Total Arc of Motion: We aggressively buy back the internal rotation and thoracic spine mobility that pitchers naturally lose over a long summer season.
2. Re-Educating the Eccentric Brakes: We implement high-level deceleration programming for the rotator cuff and posterior shoulder to ensure his body can safely slow his arm down without jamming his elbow.
3. Targeted Soft Tissue Mobilization: We use advanced manual therapy to clear out guarding and trigger points in the triceps and forearm muscles that are forcing the joint into a compressed state.

Stop Masking the Symptoms. Fix the Track.

If your son is taking the mound for his travel team in Westfield, Carmel, Noblesville, or Zionsville and complaining that his arm feels like it’s jamming or snapping painfully in the back, do not drop three Advil in his bag and hope for the best. Ibuprofen doesn't fix the compressive forces happening at his elbow.

At Integrated Performance, operating directly out of the Indiana Baseball Academy in Westfield, we treat youth, collegiate, and professional baseball players with data-driven clinical accuracy. We will perform a comprehensive kinetic chain evaluation, test his joint laxity to ensure his UCL is secure, and design a precise, week-by-week rehabilitation and throwing blueprint to keep him safe and dominant on the dirt.

Protect his arm before a yellow flag becomes a red one. Call us today at 812-686-9550 or Schedule an Elbow Evaluation Today.