18 parts Ongoing Milagros Rose Rosales, a Mexican American from Los Angeles County, makes her major league debut. June 21st, 2014, at the age of 16. Yep, the first female and the youngest soul ever to step foot on a baseball field. She also graduated high school at 16 because she was the youngest and lived in Los Angeles. She signed with the Los Angeles Dodgers. Clayton Kershaw, Andre Either, Adrian Gonzalez, and others got to see her grow up from a teenager at 16 to almost 30 years old. She set standards high around the world while also continuing her education and career outside of baseball. She's seen it all; she lost friends, gained friends in MLB, and gained lovers who liked her, but she never bothered. She gained teammates who adored her presence, became aunts to their children, and became lifelong close friends.