Mike Trout
On April 17, 2015, Trout became the youngest player in MLB history to reach 100 home runs and 100 stolen bases. He was 23 years and 253 days old when he reached the milestone, passing the previous record-holder, Alex Rodriguez, who had achieved it at the age of 23 years and 309 days in 1999. Trout led off the 2015 MLB All-Star Game with a home run, becoming the fourth player in All-Star Game history to do so. For the second year in a row, Trout won the All-Star Game MVP Award, becoming the first player ever to win it in consecutive years. On September 22, Trout hit his 40th home run, becoming only the second Angels player to hit 40 home runs in a season. Trout led the AL in WAR for the fourth straight year.
Robert Stock
As a 12-year-old, Stock was throwing an 80 mph fastball. In 2002, he threw a no-hitter to lead Agoura to an 11–1 victory over Taiwan in the Pony Baseball's Bronco League World Series (ages 11-12) championship game. "Baseball America" rated him as the best baseball player of his age in the country when he was 13 years old in 2003, 14 years old in 2004, and 15 years old in 2005. Stock played for the United States junior national baseball team in 2004 (as the team's youngest player ever, at 14 years of age, and number one pitcher) and 2005.