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.
Byung-hyun Kim
Kim was signed by the Arizona Diamondbacks on February 19, 1999. Kim went 2–0 with 32 strikeouts in 21.1 innings in El Paso (AA) and then went to Tucson Sidewinders (AAA), where he posted 2-0 with 21 strikeouts in 17.1 innings. His ability to strike out batters caught the attention of Diamondbacks coaching staff. He was the youngest player in MLB at the time he debuted on May 29 at Shea Stadium. He came in to pitch in the bottom of the ninth inning, and after retiring Edgardo Alfonzo and John Olerud, struck out Mike Piazza and got the save in the Diamondbacks' 8-7 victory over the New York Mets.