Best Plyo Balls for Pitching to Boost Velocity and Arm Strength
Plyo balls for pitching are compact, purpose-built tools designed to improve throwing velocity, arm speed, and pitching mechanics. This guide highlights five top options, detailing who each product is best for, along with practical trade-offs. Whether you’re a beginner building a foundation, a rec player seeking better velocity, or a coach assembling a training kit, these weighted baseballs offer focused resistance and durable construction to support progressive training.
Weighted Baseballs 6 Ball Set: Durability For High-Volume Training

Best for players needing a broad progression range. This 6-ball set spans from lighter to heavier options (3.5 oz to 20 oz), enabling adjustable resistance for arm strength and velocity development. The design emphasizes durability, with capabilities stated for up to 18,000 throws and resilience on hard surfaces. Choose this for structured progression and long-term bullpen work. Caution: heavier weights require careful volume management to reduce elbow loading during early phases.
Plyo Soft Shell Weighted Ball Set 32, 21, 14, 7, 5, 3.5oz

Best for beginners to intermediate athletes building fundamentals in velocity training. The 6-ball set includes 32, 21, 14, 7, 5, and 3.5 oz options, allowing gradual overload and grip adaptation. Durability in hard-surface throws supports indoor training and home facilities. This set is well-suited for players who want a clear, staged path to increased arm speed. Caution: ensure proper form to maximize gains and minimize stress on the throwing arm.
GoSports Pro Plyo Set: 6-Weight Range For Mechanics

Best for players focusing on mechanics and velocity synergy. The Pro Set includes six balls with weights spanning light to heavier weights in precise increments, enabling rapid cycling through drills that emphasize power development and throwing mechanics. This set is particularly suited for athletes who want variety in a single training session and coaches guiding form-focused workouts. Caution: heavier weights should be introduced gradually to avoid excessive joint loading early in a program.
Marv Balls – Velo Set For Plyo Drills

Best for athletes seeking a soft-shell option with realistic seam texture for grip work. The Velo Set includes multiple weights (3.5 oz, 5 oz, 7.5 oz, 10 oz, 1 lb, 2 lb) and a carry bag, with seams and leather-like texture to simulate game-like feel. Ideal for drills that require precise finger placement and grip cues. Caution: the heavier balls (1 lb and 2 lb) are not suitable for beginners until proper technique is established.
SunNordic Seams Plyometric Weighted Baseball Set

Best for versatile training across skill levels. The SunNordic set includes six balls with weights ranging from 3.5 to 16 oz and adds a training band for resistance work. The inflatable soft-shell construction with iron-sand filling aims to balance weight, control, and feel, promoting progressive velocity gains. This set suits players who want a compact kit with an added resistance option. Caution: ensure appropriate use of the included band to avoid over-extension during drills.
Buying Guide
What weight progression should I start with?
Begin with lighter weights (3.5–7 oz) to establish proper throwing mechanics. Gradually introduce heavier balls (14–20 oz) as form and control improve. A structured progression helps minimize injury risk while maximizing velocity gains.
How many balls should I train with per session?
A common approach is to cycle through two to four balls per session, focusing on one or two drills at a time. Use a lighter ball for warm-ups and a heavier ball for overload work, ensuring adequate rest between sets.
Which features matter most for durability?
Look for reinforced shells, seams designed for grip, and construction tested for repeated throws into hard surfaces. A durable build supports longer training cycles and frequent use without replacement.
Are soft-shell options better for beginners?
Soft-shell weighted balls can offer a safer feel and realistic grip for new players. They may provide a softer impact on walls and indoor facilities, but ensure the seams and texture still facilitate proper grip and release cues.
How does using these items affect throwing mechanics?
Plyo balls encourage faster arm speed and improved throwing mechanics by providing resistance that reinforces correct sequencing, grip, and release. Drills should emphasize controlled acceleration and a clean, repeatable release pattern.
What should I consider when choosing a kit?
Consider the weight range, number of balls, presence of a carry bag, and whether you want extra features like seams, soft-shell texture, or a training band. A kit with multiple weights and a clear progression path is generally most versatile for mixed sessions and coaching use.
Quick reference: product highlights at a glance
- VeloU 6 Ball Set: Broad weight range; high durability; ideal for long-term progression.
- Grady’s Pitching School Soft Shell: Realistic feel with seams; durable for hard-surface training.
- GoSports Pro Plyo Set: Varied weights; strong mechanics focus; good for dynamic drills.
- Marv Balls Velo Set: Soft-shell with realistic seams; versatile grip cues; includes carry bag.
- SunNordic Seams: Includes training band; all-levels suitability; durable PVC with iron-sand fill.
Frequently asked questions
- What is the main benefit of plyo balls for pitching?
– They help develop arm speed, improved mechanics, and targeted strength through progressive resistance. - Should beginners use heavy balls right away?
– No. Start with lighter weights to learn proper technique before increasing load. - Can these replace traditional throwing drills?
– They complement, not replace, standard throwing exercises by emphasizing power and grip cues. - How should I structure a typical plyo ball workout?
– Warm up, light-ball drills focusing on form, then overload drills with progressively heavier balls, ending with a technique-focused cool-down. - Is it necessary to use a protective wall or net during practice?
– Yes, use appropriate training space to reduce risk of injury and protect surroundings.
| Product | Best For | Weight Range | Key Benefit | Limitations |
|---|---|---|---|---|
| VeloU 6 Ball Set | Progression-focused players | 3.5–20 oz | Broad overload range for velocity gains | Heavier weights require form discipline |
| Grady’s Soft Shell Set | Beginners to intermediates | 3.5–32 oz | Durable for hard-surface drills | Heavier weights may be challenging |
| GoSports Pro Set | Mechanics-first athletes | 100g–450g | Dynamic weight variety for mobility | Requires structured drills to maximize gains |
| Marv Balls Velo Set | Grip and seam-feel enthusiasts | 3.5–2 lb | Realistic seams and texture | Heavier weights demand technique |
| SunNordic Seams Set | All skill levels | 3.5–16 oz and up | Includes resistance band for added training | Band use requires guidance |