Sports: Baseball and Football
Hometown: Fountain Valley, Calif.
One of only two underclassmen to participate in last year's Under Armour All-America game, Martinez appears to be a first-round lock for next year's MLB Draft. He's currently the top-rated prospect in the 2013 class by ESPN. In March, he helped the Mater Dei Monarchs to USA Baseball's inaugural High School invitational title, batting .538 in four games; for the 2012 season, he hit .388 with 18 RBIs. Martinez verbally committed to USC at the end of his freshman season, but that won't stop a team from drafting him early.