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.
Jim Brillheart
Brillheart is one of the few pitchers in baseball history to appear in over 1,000 games, compiling 956 in the minor leagues and 86 in major league, during a career which lasted from 1921 to 1951. He was 18 years old when he reached the majors in 1922, and was the youngest player in the major leagues that season, pitching in 31 games for the Senators. He played for three different teams in part of four seasons, in which he posted an 8–9 record with 98 strikeouts and a 4.19 ERA in 286 innings pitched. His minor league career continued through 1951, when he pitched in 3 games for Tacoma of the Western International League.