UPDATE: How do I get started training with weighted baseballs? Be sure to get the Free Weighted Baseball Program on our site–it’s a simple 8-week year-round starter program!
At Driveline Baseball, we constantly test training and recovery implements for our pitchers. Most won’t surprise you – we use free weight training with barbells and dumbbells, medicine balls of varying weights for rotational exercises, a chin-up bar for pull-up variations, sled push/pull interval training for energy system development, resistance bands of varying tensions to improve stability/mobility and to provide accommodating resistance for more advanced lifters, and lots of other techniques like high-speed video to analyze someone’s mechanics for flaws.
However, a misunderstood training tool that we use is weighted baseballs.
Research backs up the use of underload and overload training in various forms, and it’s no surprise that it works for baseball pitchers as well. Dr. Coop Derenne is the foremost expert in this field and has published a number of research papers that indicate that weighted baseball training creates a significant increase in velocity for those training with underweighted and overweighted baseballs. His most popular paper is Effects of Under and Overweighted Implement Training on Pitching Velocity, which concludes that training with either underweighted (4 oz) or overweighted (6 oz) baseballs improved pitching velocity when compared to simply throwing normal baseballs.
How do you implement weighted baseballs in your Pitching Program?
Like most coaches who do weighted baseball training, we don’t train too aggressively with them until athletes have gone through our initial evaluation to determine shoulder/hip imbalances and pitching mechanical efficiency. Additionally, our athletes aren’t typically throwing weighted baseballs in-season and only throw them when they have a solid throwing program under their belt. No getting into the weighted ball throwing when they’re cold and throwing 80-85% of their max velocity off a mound!
After we’ve qualified a pitcher to use these implements, we design a program around their age, skill level, bodyweight (very important for recovery purposes), fastball release velocity, and mechanics. We are generally more aggressive with guys who are older and have more refined mechanics – especially if they’ve gone through multiple high-speed video analyses in our Pitching Program. (Athletes who have had their pitching mechanics biomechanically analyzed in our lab can see a lot of improvement with a more specific plan, and we recommend it to all pitchers over the age of 16 who are seriously considering college or pro baseball.)
A typical program for an 18-year old high school senior about to enter college baseball will be throwing batting practice once or twice per week and one short bullpen once per week. On his bullpen days and possibly on one of his batting practice/light throwing days, we’ll have him throw weighted baseballs using a truncated motion that focuses primarily on shoulder rotation. The mechanics in our “Pivot Pickoff” 3 lb. medicine ball drill is similar:
Obviously the pivot pickoff drill focuses mostly on the out-front portion of the pitch while the 3-11 oz. baseballs will more accurately reflect an actual pitch.
What’s the typical throwing progression with the weighted baseballs?
When throwing with a full mechanic off flat ground or the truncated motion to focus on shoulder rotation we’ll go as light as 3 oz and as heavy as 7 oz, which runs counter to what most people recommend. Many sources will tell you to stick to +/- 20% of the original implement’s weight (5 oz), but these recommendations are based off of Soviet shot-put research and not baseball-specific research.
We do not throw weighted baseballs off a mound, as arm-related stress increases when throwing off a mound and when using weighted baseballs – combining this much torque is not something we play around with lightly!
Update 7/22/2017: Recent research by ASMI found that throwing weighted balls off a mound results in similar elbow torque to 5 oz baseballs. It found that 6 & 7 oz balls were less torque than a 5 oz ball, while the 4 oz ball resulted in similar torque to the 5 oz. You can read more about that study and our analysis of it here. Because of that, and other research, we are experimenting with throwing weighted balls off a mound.
A typical weighted ball progression for the aforementioned 18-year old high school senior might look like this:
Weeks One and Two – 39 pitches, 2 sessions per week
- Four throws with standard baseball (5 oz)
- Four throws with overweight baseball (6 oz)
- Four throws with overweight baseball (7 oz)
- Three throws with standard baseball (5 oz)
- Four throws with underweight baseball (4 oz)
- Four throws with underweight baseball (3 oz)
Weeks Three and Four – 52 pitches, 2 sessions per week
- Five throws with standard baseball (5 oz)
- Five throws with overweight baseball (6 oz)
- Five throws with overweight baseball (7 oz)
- Four throws with standard baseball (5 oz)
- Five throws with underweight baseball (4 oz)
- Five throws with underweight baseball (3 oz)
Depending on how the athlete is progressing, we’ll switch it up going forward – generally we add more repetitions, but it can depend on how his progress in the weight room is coming along or where he is at in the off-season. This training is all on top of the free weight training, anaerobic energy development, medicine ball throwing, and throwing-related PlyoCare drills – a topic we cover extensively in our training guides.
A full off-season and in-season weighted ball velocity program, based on the best of what we’ve researched, is available in Hacking the Kinetic Chain.
Want to train with us? We have options for local and remote athletes.
The Final Scoop
Weighted baseball training can be beneficial for a lot of baseball pitchers out there. However, I would caution against blindly running to them as a tool to gain velocity. In my opinion, pitchers should build up a reasonable amount of strength in the gym and ensure their shoulders are adequately stable before getting into a training program that is necessarily going to increase torque and maximum external rotation (MER) in the athlete’s delivery. Find a pitching coach who can assess your shoulders and safely on-ramp you into an aggressive training program.