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quote:
Originally posted by Three Bagger:
I think one thing to be considered is that 60yds the players speed is still increasing. A 6.6 60yds figures to 10 yards every 1.1 seconds. This means the same player would run a 4.4 40 yard dash and I know very few guys who run 6.6 60's can do that. My son has run 6.6 but he can't run a 4.4 40. So you can't just multply it out and say a 100yd time would just be a multiple like that. Now if my son ran the 60 in his track shoes he might run a 6.4-6.5.


Robert Adair in his book The Physics of Baseball plotted world record times for distances 30-100 yards/meters and showed that they fall on a straight line. Which is to say that a runner's speed is not increasing at 60 yards or even at 30 yards. Instead, it takes a long time to get started.

Adair didn't include the slope of the line in his book, so I pulled some times off the internet, and plotted it up in Excel. The best fit line shows that a very good estimate of the best times in the world is 0.078 times the number of yards + 1.254 seconds. The largest deviation between actual time and the time predicted by this formula is 0.06 seconds. For comparison, Adair gave the additive constant as 1.235-- pretty similar.

These are track and field times, and are taken electronically as the time between the click of the starter's pistol and the runner crossing the tape. A baseball 60 yard time, or football 40 yard time removes the runner's reaction time, which is usually guessed to be around 0.15 seconds. In football, the clock is hand started which subtracts another 0.15 seconds. On the other hand, running the 60 yard dash on grass and in baseball cleats has got to be slower. I'm not sure how PG uses their laser timing, but it presumably removes the reaction time of the person starting the timer.
quote:
Originally posted by RJM:
I didn't say he can't dive twelve feet. I'm saying he can't beat a good move back to first from twelve feet.


You still need a good move back and an accurate low throw to tag him. Believe it or not, It's very hard to find a pitcher with good pick off move at 14U.
That's why I am emphasizing pre-high school level.
Maybe your picther could do it, but most 14U pitchers couldn't.
Last edited by coachbwww
Andrew Jones now makes 80 to 100 less plays than he did before he got fat. Assuming he still gets the same reads and jump this illustrates that raw speed is the difference. There are players who know how to run bases and get jumps on flies that also happen to have outstanding speed and I'll take that talent over the other guy every time.

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