In general, add aboout 20 mph because you are calculating the different pitching lengths. Little league pitchers throw from 45 feet, major leaguers throw from 60.5 feet. For example, a little league pitcher throwing a 70 mph pitch is equivalent to a major league player throwing about a 90 mph pitch.
I don't know exactly but I've watched the Little League World Series enough and they always refer to Little Leaguers pitching speed in relation to MLB and I believe that 70 mph Little League would be around 100 mph MLB A 70 mph little league pitch is equivalent to about a 111 mph MLB pitch. (This is calculated based on an average little league pitch at 57.5 mph and an average MLB pitch at 91 mph.)
yes, there are no rules/regulations for pitching in softball. that's just baseball.
no
As of 2014, AAU baseball does not have a mandatory pitch count. ASMI has set one, and all levels of Little League baseball have them.
You must pitch the ball in 12 seconds in pro and little baseball. If the batter doesn't come, then you just have to pitch it.
yes
46 feet
I am not quite sure who the fastest pitcher in general would be, but a few pitchers such as Trey Quinn, Kennon Fontenot, and Kyle Carter are known for pitching in the low 80's. The fastest little league pitch I have ever seen was 84mph by Kyle Carter from Columbus, GA.
I am in little league and so I know a little about this. I'll say on average we pitch about 60 pitches. Not that many, but a lot in just six innings.
Their fastballs are around 70mph, the equivalent to 90mph in MLB. ESPN shows the conversion to MLB since they pitch from 60'6" and Little League is only at 46'. Whatever it is, I'd be pressed to hit it.
yes, they can.