What are the basic eligibility rules contained in the High School, College or Junior College Rules in Major League Rule 3?
High School — Generally, only those high school students in the United States or Canada who have exhausted their eligibility to participate in high school athletics are eligible for selection.College — Generally, a student at a four-year college is eligible after completion of their junior year or if the student is at least 21 years old.Junior College — All junior college students are eligible for selection.The applicable Major League Rules are more specific than this general answer. Players with specific questions about eligibility should consult a Major League scout or Office of the Commissioner of Baseball.