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Backdash,
The growth charts say he'll be almost 6'3" at 18yrs 3mo during his senior year. That's about a 3mph gain for the height increase and about a 5 mph gain for the age increase for a total increase of about 8 mph most of which should occur by his junior season.

If he currently cruises at about 78.5 mph then he fits the database pretty well. (I'll go back in and check to see if he's in the database.) (edit - Looks like he was 5'10" and throwing 74 mph 5 mo. ago so my guess would be that he's cruising about 77 mph by now.)

Of course every individual is different so this is worth about as much as you are paying for it.
Last edited by CADad
Superman28,
Probably about 3mph. If you are really only throwing about 80mph at your size and age you need to get with a good pitching instructor to take a look at your mechanics.

These "predictions" can't take into account changes in mechanics and building up arm strength. A local college pitcher went from mid-80s to Houston's first pick in the 2003 draft, throwing low to mid 90s. My predictions wouldn't have shown any increase for him.
H-TownHeaters,
About 2mph. Once again, you probably aren't throwing with optimum mechanics given your current age, size and velocity and you should consider working with a good pitching instructor.

All of these predictions presume a very "typical" player and there isn't really any such person. For example, the growth charts say you only have about an inch to grow but if you matured late you might still grow a few inches. One never knows.
You cannot predict how fast someone will throw in 4 years off of size age or whatever. Size has very little to do with throwing hard while it helps but if you look at guys like Casey Fossum, Ron Guidry, Pedro Martinez, Rich Harden and Roy Oswalt they are little guys that throw gas. And lastly on this site everyone gets so caught up in speed if you throw 95 miles per hour flat as hell and you have nothing else it doesnt matter minor league parks and independent leagues are filled with guys like that.
Saint15,
Actually size does make a difference. Taller players tend to throw harder. Sure there are shorter players who can throw quite hard but in general taller players throw harder. There's also a typical amount that players increase their velocity as they get older. Exactly when the peak increase occurs is usually a function of when they mature. In general very little velocity increase occurs due to growth or maturity after about 17 years of age. In some specific cases a pitcher will mature late or make changes in their delivery or develop arm strength that allows them to reach the potential that they weren't reaching by 17. I saw a pitcher go from a max of high 80s to a max of high 90s between 18 and 21yo, then again he was 6'8" tall.
OPBaseball,
Sorry. Way too young. It really just shows trends for kids and can't be assumed to apply to any one player. The database doesn't have anywhere near enough players your son's age to make predictions that are anywhere close to being valid.

All the database is really saying is that kids tend to add about 3 to 4 mph a year on their fastball until they reach puberty at which point they gain a bit more for a couple years then they start to gain less each year and in general stop gaining any significant velocity when they're done growing.

Velocity seems to be strongly linked to both age and height so I estimate height increase over the years based on the growth charts and plug that into the database, but once again although kids in general grow according to the growth charts every kid is different and the growth charts are only a guide.

I've got a 13yo player on my team who the charts say will end up being 5'6" who the doctors think will end up about 6'1". His dad didn't grow until he was 17 and the dad is 6'2" or 6'3".
Last edited by CADad
Callaway,
I am just a bit further down the road than you are. I won't be 48 and 6 mos for another week. I cruise at about 58 to 60 during normal BP and 62-64 when I just allow my arm to hurt. I was able to top out at 70 last year but am down to 68 or so this year. Of course you have a 30lb weight advantage and an inch height advantage on me so I predict that your arm will give out soon as you'll be trying to get Boomer ready to handle post-season smoke. I'm going with a lot of soft toss and short toss myself since I can't throw as hard as the better 13 and 14yo pitchers anyways, although I do have better breaking stuff, so my arm should degrade gracefully. Wink
Last edited by CADad

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