What level of player?

When mine was a Soph we went to a PG event where they rated him. If you don't want to spend the money, a local pro scout, former MLB/college players many times coach in your area, travel team coaches (who are reputable and been doing it for a while), HS coaches who have put kids in the in college programs are all perfect sources. Go to a few college games in your area with your son and look for yourself. There is no magic person who will give the the complete picture but get advice from multiple sources and you will know. 

So 15 years old sophomore is not too early?

I think what you should understand is that any age is fine....but here is what happens.  The younger the player, the person doing the evaluation will be taking into account their age, size, ability (likelihood, or not likely) to grow more (how tall are his parents in relation to what size the player is...etc.).  So a 14 or 15 year old will be viewed in the context as to how he will project as a potential college player, whereas a Junior or Senior is almost there, so they project less, and compare their current talent to the college level talent.

Example:  15 year old throwing mid 80's with good size, but hasn't filled out yet, may project as a potential D1 recruit, whereas that same player that may be throwing mid 70's, looks like he may have reached his growth potential, may be told they project as a Div II, or lower.  An 18 year old would be evaluated based on for the most part having reached his growth potential, and not as high of a ceiling as the 15 year old, therefore he would be gauged with his current skill set being able to play at the next level. 

Hope that helps.  Both can be very valuable.

Keep in mind that the earlier you have an evaluation the more room for "error".  I have seen kids make an unexpected leap in velocity, mechanics, or growth spurt that was  unexpected. The early evaluation is only a gauge, but not something you hang your hat on.  Of course, the older the player, the less chance of much dramatic changes.

Got it. Thanks. On a related note is it better to have a complete stranger or someone who has seen him play quite a bit? Assuming it's someone who doesn't stand to profit either way.

If the person evaluating knows your son, there is the potential (even if they don't realize it) to be biased....some can do it without bias, but likely someone who hasn't seen him, would give you the best, unbiased opinion.  This is a large community, maybe if you post what area you are in, some folks here can chime in on some recommendations.  Just because someone played at a high level does not qualify that person as a good choice to judge, or better yet "project" talent....the younger the player the more variables are used to evaluate. 17 & 18 year olds are much easier to evaluate.

That's what I was thinking. I'm in the Atlanta area. I do know a former MLB scout that hasn't seen him play since he was 10 that I was thinking about. But a total stranger would probably be best.

Don't worry about whether you know the person or not. Have it be someone whose judgment you trust who is capable of being honest with you. Along the way I had three trusted people whose judgment I didnt solicit, but trust provide three different observations from high end D3 to major conference regarding my son. Then as a former college player I also had my own opinion which differed from a friend who made it to AAA who thought higher of my son than I did.

Some showcases, like PG, do a terrific job evaluating "potential".  However, I didn't get my son evaluated by them until he was 16.  He's almost 19 now and a freshman in college playing baseball.  I would have to say their score was right on the mark.

Nope.  My son's youth and travel coach used to joke with him that he should be looking into a specific level and conference when he was 15.  We went half way around the world with travel baseball showcases, tournaments, etc   It was a great experience, and I wouldn't trade it for the world.  But guess where he ended up?  Exactly where his youth coach and travel coach (he coached him for 8 years) suggested in the first place.   Pretty freaking ironic if you ask me.

Most good travel ball programs are typically coached by x-players (college/MiLB/MLB) and see dozens of kids recruited each year. Those guys are pretty good at getting you in the ball park range of where you should be targeting level wise. 

He plays in a program that has placed more kids in college than any other team at East Cobb (other than the Astros) so I know the coaches there could tell us. I guess I was hesitant to find out the level knowing that he improves each year. Of course the longer you wait , the less time you have.