I wanted to add a little firsthand experience to this discussion. This season, our freshman son played on a freshman team at his HS. His school is one of the most athletically competitive in the country...athletic program ranked #5 in the nation by Sports Illustrated. They know what they're doing.
There were a number of very talented freshman baseball players, several of whom I am pretty darn sure will play beyond HS. I'd like to believe my son was one of them...but I'm his dad so lets put that aside.
In any case, no freshman was promoted to JV or varsity all year long. At the beginning of the season the varsity coach (of 20+ years with dozens of former players now in college or pro ball) had a meeting to discuss his philosophy. He said (more or less):
* Several of your kids are good enough to play varsity somewhere...maybe even here, but...
* playing time would be more scarce than on the freshman team, and....
* it is a big disruption to the upperclassmen, who have worked for
their chance for 3+ years, to have a freshmen in their dugout and frankly they aren't treated particularly well no matter how much effort I put into it (and by the way, I believe this point in his philosophy will become even more important to us freshman parents in 2 years when we are treated the same as this years' upperclassmen), plus...
* we believe here they will grow more, as a unit, in the long run by playing together as friends and as a team, and...
* there is no need to rush, at age 14/15, to become a "varsity" player.
* Lastly, you as a parent ought to consider whether or not you want your 14/15-year old in a dugout with 18-year old conversations all around him.
Now let me also say that this particular program is, by far, THE MOST welcoming HS-level baseball program of ANY I have ever been around...HS, summer, travel, etc... Players and families top-to-bottom are tremendously supportive...they BBQ together after games (in between fields). They attend each others' games. They work with each other in practice and play intra-squads together (where I assume the coaches are getting all of the evaluation they need for the long run). And yes, they have promoted a few (3 I believe) freshmen to varsity over the years...all 3 were absolutely exceptional players who went well beyond HS.
And this freshman team just finished up at 21-0 in the toughest league in Northern California...and everyone I know is happy.
If done the right way, it is a beautiful thing!