Baseball Sports Performance: Early-Season Arm Injury Prevention: What Youth, College, and Pro Players Need to Know
By Dr. John Mishock, PT, DPT, DC
Every spring, baseball players ramp up throwing, bullpens, long toss, batting practice, and games—often all at once. That is exactly when elbow and shoulder injuries start to spike. Whether the athlete is 12, 18, or pitching professionally, the pattern is the same: too much throwing, too quickly, with too little recovery.
Common Mistakes Leading to Throwing Injuries
The biggest mistake players and parents make is assuming arm injuries are random. They are not. The research is clear that most throwing-related arm problems are tied to workload errors, poor recovery, mobility deficits, rotator cuff and scapular weakness, and breakdowns in the kinetic chain. In plain English, if the body is not prepared to absorb and transfer force efficiently, the shoulder and elbow pay the price. Recent reviews support that prevention programs aimed at shoulder mobility, external rotation strength, scapular control, and full-body function can reduce throwing injuries, especially when compliance is high (Karasuyama, et al. Journal of Shoulder and Elbow Surgery, 2024; Moiroux-Sahraoui, et al. Diagnostics, 2024).
Youth Baseball: Overuse and Pitch Counts
For youth players, overuse remains the number one issue. Too many young athletes pitch on multiple teams, play year-round, throw while fatigued, and chase velocity before they have built a physical foundation. The American Sports Medicine Institute continues to recommend that adolescent pitchers follow pitch-count and rest-day rules, avoid overlapping teams, and stay under 100 innings pitched in games per calendar year (American Sports Medicine Institute Position Statement, updated guidance). MLB and USA Baseball’s Pitch Smart program also advises taking at least four months off from throwing each year and not exceeding age-based pitch limits (MLB/USA Baseball Pitch Smart).
High Intensity Throws and Injury Risk
That matters because high throwing volume is not the only problem—high intensity matters too. A 2024 study on high school pitchers found that throwing at higher velocity and higher intensity increased injury risk, especially as pitchers got older and more competitive (Zaremski, et al. American Journal of Sports Medicine, 2024). In the pro game, newer research also shows that pitch-tracking and velocity-related metrics can predict future arm injury risk better than simple demographic data alone (Oeding, et al. Orthopaedic Journal of Sports Medicine, 2024). Translation: the radar gun is not just measuring performance—it may also be exposing stress.
Shoulder Mobility and Rotational Range of Motion
Another major risk factor is mobility loss, especially at the shoulder. Throwers commonly develop changes in rotational range of motion over the course of a season. Some adaptation is normal, but when the total arc becomes limited or internal rotation drops too far, stress rises elsewhere in the chain—often at the elbow. Prior prospective studies repeatedly identified deficits in shoulder range of motion and preseason weakness in the rotator cuff as meaningful predictors of arm injury (Tyler, et al. American Journal of Sports Medicine, 2014; Wilk, et al. American Journal of Sports Medicine, 2014; Shitara, et al. Knee Surgery, Sports Traumatology, Arthroscopy, 2017).
Early-Season Screening and Prevention
These remain highly relevant to preseason and early-season screening. So what should players actually do?
Gradual Throwing Progression
First, build up throwing progressively. Early season is not the time to jump from low winter volume into high-velocity pens, showcase throwing, mound work, and weekend games all at once. Workload should ramp in layers. Recent collegiate preseason data suggest players can hit risky workload spikes if volume rises too aggressively, reinforcing the need for a gradual build (Tabaracci, et al. Sports Health, 2025).
Priortizing Recovery
Second, protect recovery like it is part of training, because it is. Players should not throw through significant fatigue, loss of command, arm soreness that lingers, or progressive velocity drop. Those are not badges of toughness—they are warning signs.
Shoulder and Scapular Strengthening
Third, train the shoulder and scapular system on purpose. The evidence supports prevention programs that include posterior shoulder stretching, external rotation strengthening, scapular control, and broader arm-care routines. A randomized trial showed that external rotation strength training was not inferior to sleeper stretching for preventing shoulder and elbow injuries in high school baseball pitchers, and both approaches have practical value in an arm-care program (Shitara, et al. Scientific Reports, 2022).
Full-Body Kinetic Chain Training
Fourth, do not ignore the legs, trunk, and hips. Throwing is a full-body power transfer. A systematic review on overhead athletes emphasized that the kinetic chain plays a major role in injury prevention because force generation and transfer begin from the ground up, not at the shoulder alone (Moiroux-Sahraoui, et al. Diagnostics, 2024). If the athlete lacks hip mobility, balance, trunk control, or lower-body force production, the arm often becomes the compensator.
Early Intervention for Arm Problems
Finally, screen problems early. A player does not need to be “injured enough” to get help. Loss of motion, recurrent tightness, persistent soreness, decreased velocity, altered command, dead arm, medial elbow pain, or front-of-shoulder pain are all reasons to get evaluated before a mild issue becomes a season-ending one.
At our clinics, we believe the best arm-injury treatment is to catch the problem before it becomes a major one. That means looking beyond pain and assessing the entire throwing athlete: shoulder and elbow motion, cuff strength, scapular control, thoracic mobility, trunk stability, hip function, workload history, and throwing progression. For baseball players with pain, stiffness, loss of velocity, or recurring arm trouble, physical therapy can help identify the true driver of the problem and create a plan to keep the athlete on the field.
Key Takeaways: Preventable Risk Factors
The bottom line: elbow and shoulder injuries are not just bad luck. In youth, college, and pro baseball, the biggest risks are predictable—and preventable. Smart workload management, proper rest, shoulder mobility, arm-care strength, and full-body movement quality are the pillars of staying healthy all season long.
If you or your athlete is dealing with arm pain, loss of throwing velocity, shoulder tightness, or elbow soreness, now is the time to address it—not halfway through the season when the damage is already done.
However, it is not too late to start. Combining proper education, exercise training and throwing mechanics will allow the pitcher to throw harder with greater control while preventing arm injuries. It also reduces arm injury potential by reducing strain on the elbow and shoulder related to poor mechanics and inadequate baseball physical fitness. My book “Fundamental Training Principles: Essential Knowledge for Building the Elite Athlete”, “The Rubber Arm; Using Science to Increase Pitch Control, Improve Velocity, and Prevent Elbow and Shoulder Injury”
We can help!
If pain is limiting you from doing the activities you enjoy, give Mishock Physical Therapy a call: locations in Gilbertsville (610-327-2600), Skippack (610-584-1400), Phoenixville (610-933-3371), Boyertown (610- 845-5000), Limerick (484-948-2800) at www.mishockpt.com or request your appointment by clicking here.
Dr. Mishock is one of only a few clinicians with doctorate-level degrees in both physical therapy and chiropractic in the state of Pennsylvania. He has also authored two books; “Fundamental Training Principles: Essential Knowledge for Building the Elite Athlete”, “The Rubber Arm; Using Science to Increase Pitch Control, Improve Velocity, and Prevent Elbow and Shoulder Injury” both can be bought on Amazon or train2playsports.com.
