[Jim S]

I am going to agree pretty much with the others. 1. Legal
2.Legal but darn close.
3. Illegal. But not because the ball has left the zone, which it hasn't when he starts the block
Now the question being is it the kid or the blocking scheme. It's not the kid. If you go stop motion, in each case, he starts the block immediately at the snap. This is what he's been taught to do and it's an ok technique. The problem is that in 3 definately, and close in 2, he has too far to go to make the contact with the opponent.
The coaches need to be made aware of this problem.