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.
Jurickson Profar
On August 31, 2012, Profar was called up to the Rangers as major league rosters expanded and as a possible postseason addition. He is the first player born in 1993 to play in the majors and was the youngest player active in the major leagues. In his major league debut, Profar started at second base in place of Ian Kinsler, who was out due to back stiffness, and hit a 388-foot solo home run off of Zach McAllister in his first major league at bat. He then later doubled in his second at-bat, and went 2 for 4 for the game. In 9 games, Profar batted .176 with a home run and 2 RBI.