Here are a few resources that helped us out a few years ago...and a couple new ones I found...
1.
http://eteamz.active.com/5abaseball/index.cfmHouston 5A baseball has a tremendous following & presence in the baseball community. Contact Randy Byers (founder of H5ABaseball) for info on "local or Regional showcases".
2. Triple Play Baseball hosts many tournaments & showcase events. Summer Select Teams typically focus on the "Showcase Ciruit" for both Juco & 4 yr. college recruits...TPB may be able to help you with getting your son on a team as a guest.
3.
http://www.theballparkacademy.com/camps.htm. New, so don't know much about them.
4. Houston Heat & Kyle Chapman...great summer teams,... may accept guest players...
5. Louisiana All-Stars Baseball Club...in (Baton Rouge) Louisiana & takes his teams to many Showcase events around the country & hosts a few high profile tournaments in La.
6. Check with JUCO's & 4 yr. schools (Tulane, LSU, McNeese, UNO, LA. Tech, etc.) to see if they host showcase events, or can tell you about the "showcase ciruit".
7. PG...check their schedule in Jan for Houston Area Underclass events or BCS/ WWBA events in South Texas/ Houston Area. Last year they did Underclass at both Baylor & Texas A & M...
LOTS of exposure with either of these venues!!! Excellent!!
8. If he's a stud,
, check MLB Scouting for list of tryouts...usually they publish the list in May for the upcoming summer...
9. Randy Taylor, Tex. Rangers Scout, in Houston, or Rusty Gerhart, MLSB scout in Texas...
10. Camps... Baylor, TCU, Tex A&M, SHSU, U of H, Tulane, LSU...Get to know these recruiters, have son fill out questionaires...gets him on their mailing list. Be sure to ask which College recruiters have "committed" to attend...that's often different than "We invited Coach So & So at XYZ Univ..."
15 yrs. may be early for some, just right for others. Recruiters like to see a couple years of "progress", meaning they follow kids during HS. Can't comment on your HS coach recommendations for "local showcases"...but he may means "camps"...(see above).
Key to the whole process is networking! Having your son evaluated objectively will give you an idea of how to proceed with the "exposure" part of the equation, related to the recruiting part of the process.
Good Luck!!