By Jim Monaghan
Baseball Health Network

They’re not new – pitchers were using them in the mid-1970’s as part of their training routine – but weighted baseballs appear to be gaining some new proponents at the MLB level.

The National Center For Biotechnology Information (NCBI) recently published an abstract by Dr. Glenn Fleisig of the American Sports Medicine Institute in Birmingham, AL (the research part of Dr. James Andrews’ world-famous practice) which examined the differences between weighted-ball exercises compared to the traditional 5 ounce baseball.

In a recent post on MLB.com, Lindsay Berra explored how pitchers at the highest level are once again turning to weighted baseballs.

Fleisig concluded that throwing slightly underweight and overweight baseballs is not only a reasonable exercise for baseball pitchers, but also that the variation from the normal routine of throwing a 5-ounce ball serves to increase awareness in the nerves and muscles and can make a pitcher more effective when he returns to the standard baseball.

However, the use of weighted balls isn’t universal across Major League Baseball.

The Phillies, Marlins, Royals and Pirates are among clubs that have been wary of using this method, with the fear that training with weighted balls — both underloaded and overloaded — creates too much stress on the elbow and can cause injury.

Former professional pitcher Brent Pourciau has cautioned against the use of weighted balls as a means of gaining velocity.

There is science showing weighted baseball training can increase pitching velocity but the question is, “At what risk?”

The Baseball Health Network offers these points of view on the subject.

Baseball Health Network founder Steve Hayward – I don’t have a concrete stand on weighted baseballs. Years ago I worked with them for a few weeks, but I didn’t like the way my arm felt throwing them and never promoted them. Over the years I’ve realized that weighted balls can have a place in a player’s training at some level. But they are certainly not for all players, only the players that have the ability to throw a regulation baseball with efficient throwing/pitching mechanics. I believe, as with any training routine, that some players will see positive results while others may see adverse reactions. My theory is if a player does something that makes his arm feel good and velocity increases, who am I to tell him not to do it? My own guideline with pitchers is to caution them to be careful when doing any type of weight training regimen.

Former MLB pitcher and current Texas Rangers/Fox Sports 1 baseball analyst C.J. Nitkowski – I am in favor of using weighted baseballs as a compliment to any arm strength program. I used them in college in the early 90’s during a period in my life when I saw my greatest gains in velocity. Long toss, strength training and nutrition all played a role. There is no one single factor that will get you the velocity gains you seek. Weighted baseballs can also be used to teach proper arm path, even in young throwers (without actually throwing the weighted baseball). Like with any training there is a risk of injury and not all players will get the same results. If you’re considering weighted baseball as part of your training make sure you read up on them, do your research and get with a professional teacher who can guide you.

Former MLB pitcher and current New York Mets/TBS/MLB Network analyst Ron Darling – (from MLB Tonight 3/15/17) I remember when I pitched for the Mets, and most of the Mets did not have any shoulder injuries because we had an old trainer, Tommy McKenna, who fought in the Korean conflict. When he came back (from Korea) he had this martial arts kind of thing with a weighted ball that we would imitate the alphabet in certain ways. No one ever had shoulder injuries because of using a weighted ball in such a way to build the back of the shoulder so it wouldn’t hurt your rotator cuff. David Cone, Dwight Gooden, Sid Fernandez, myself…all of those pitchers used it…none of them had shoulder issues.