I don't think you can know in a black & white, quantitative way. Too much depends upon the player's abilities, the flexibility of a particular HS program, coaches support, who else he's competing with for that starting position, etc. ... and ultimately what the kid has a passion for.
HS sports is a wonderful experience that you only do once in your life, so a kid should try to participate in all those sports that he enjoys playing, provided that he/she can keep up the academics and can balance the time demands if there's one particular sport that they love most and have a realistic projection in.
Ultimately, it comes down to available time and what goals a kid wants to set for himself. My son decided by his Frosh year that he wanted be a two-way player at the D1 level. That was his passion and vision. He then allocated his time around those goals, and it was just a matter of what time was left over after the mandatory time for academics. I think being a good pitcher made him a better hitter and vice versa from a mental approach perspective, but it significantly increased the time investment on his part with respect to players that focus just on pitching or just on hitting. We're not just talking some extra ABs in the cage or a couple bullpens from the regular HS workouts ... but extra hitting wiffles in the back yard, 9PM sessions with his hitting coach, rigorous weight lifting regiment, yoga & balance work, core strength training, towel drills, occasional pens with his club coach ... on top of the HS summer/fall preseason, club, scoutball, etc.
And yes, it was all him. He's just driven. I never said a word other than "yes, I can drive you" ... before he got his license. If anything, it hurt a little when he gave up basketball because that's my own personal best sport, but I've always supported and encouraged him to follow his personal vision.
Basketball and s****r were just something fun to do ... and with his athletic ability he was able to excel at them, but he had a realistic perspective, and knew that being a 6'4" D1 point guard was not in the cards. He didn't love that sport enough to invest the time necessary to take his game to that level. It would have been worth doing it just for the sake of the fun HS experience if the basketball coach had been willing to take 80% of an impact player ... instead he made it an either/or proposition and got 0%.
The baseball coach was always very supportive of multi-sport players, though I know he wasn't disappointed with the way things worked out ...
![Smile](/static/images/graemlins/icon_smile.gif)
I can still get my basketball fix in the off-season, when he comes out to play pick-up with me and schools all of us dads.