DLOck15,
If you google "Ivy Academic Index" you will get articles like this (below) that explain exactly what BOF is describing. The Academic Index or AI is the tool that coaches and Admissions Committees use in evaluating an athletic recruit for admission. It varies by school, and it is not publically published what each school's AI index is for a particular year or sport. However, you can expect you will need exceptional SATs or ACTs, high GPA, high class rank, and very rigorous classes. There is an AI conversion factor for ACTs that you can google as well.
If you are interested in an Ivy school, I suggest running your numbers through the AI calculator to get an idea of where you stand. An Ivy coach is focusing on your baseball skills, and he will probably ask you about your academic peformance relative to the items in the Academic Index. If he feels you are a strong candidate interested in the school, he will present your credentials to Admissions. Admissions will comment "LIkely" or "Not Likely". This process is called a pre-read and is the start of the overall Ivy Admissions process for athletes. There is much more, but this answers your question and gets you started.
http://www.mka.org/uploaded/co...elines_Worksheet.pdfhttp://money.howstuffworks.com...ague-admissions1.htmhttp://www.satscores.us/MyChances/AI_Calculator.aspQuestions, please let me know.