for all of those people saying that movement and location are better than speed than u may be right....for the short run. however, if this kid wants to pitch past freshmen baseball, then he better possess something better than a 60 mph fastball with "movement." i personally would rather throw high 80s, walk a bunch of people, and have a chance to pitch beyond high school than be an all conference 70 mph soft tosser.
that being said, i just played catch with my brother every day, long tossing and weighted balls, and my velocity has jumped from 65 to 84 since i was a freshmen. that, plus puberty also helped quite a bit