To throw a ball 100 MPH your arm has to be moving that fast.
The human elbow isn't designed to take that much torque.
arguably your arm itself only needs to be going 90-95mph or so, you can get the last so many mph from your wrist
Variable 10: Use of available force from wrist during pitching motion
The wrist is a very important lever in the pitching motion. In fact, Norihisa Fujii from the University of Tsukuba concluded after a 2002 study that wrist flexion and strength are major contributors for increasing throwing velocity.
In addition, many pitching coaches have incorporated a “wrist flick” during their throwing warm up progression. The Lexington Clinic reported that the wrist accounted for 10% of the force applied to the baseball during the pitching delivery.
Force is not the only function the wrist may perform. Many pitching instructors agree that proper wrist movement can help a pitcher's control and command of pitches to their target.
The following exercises may promote strength and increase speed of wrist motion:
* Weighted balls (12 oz)
* Hand grip/tennis ball
* Shot put flips (4 lbs)
* Wrist rolls
info from
that being said your arm is still not designed to do that repeatedly.
I still find the way pitch counts are used dumb though. I don't mind pitch counts but 100 being some magical number is dumb as each person is different, especially when we are talking about athletes which in general are freaks compared to normal humans and even less likely to have the same wear and tear done to them over the same time frame.
I mean some pitchers are on a longer leash, but really if we are going to use something like a pitch count we should just be sending every pitcher straight to mris and what not after a game to gauge their arms and figure out where their personal limits are around. lets make it a real individual science
of course this is the modern baseball era where they still do lefty lefty/ righty righty match ups because lefty's in general have a harder time hitting lefties despite having easily accessible personal numbers for players showing when there is an anomaly and a lefty who hits lefties way better than righties comes to the plate. yet they still bring in a left handed pitcher... so I can't expect them to embrace more than a general rule.