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.
Alex Rodriguez
The Mariners selected Rodriguez first overall in the 1993 MLB draft, and he debuted in the major leagues the following year at the age of 18. In 1996, he became the Mariners' starting shortstop, won the major league batting championship, and finished second in voting for the AL MVP Award. His combination of power, speed, and defense made him a cornerstone of the franchise, but he left the team via free agency after the 2000 season to join the Rangers. The 10-year, $252 million contract he signed was the richest in baseball history. He played at a high level in his three years with Texas, highlighted by his first AL MVP Award win in 2003, but the team failed to make the playoffs during his tenure. Prior to the 2004 season, Rodriguez was traded to the Yankees, for whom he converted to a third baseman, because Derek Jeter was already the Yankees' full-time shortstop. During Rodriguez's career with the Yankees, he was named AL MVP in 2005 and 2007. After opting out of his contract following the 2007 season, Rodriguez signed a new 10-year, $275 million deal with the Yankees, extending his record for the sport's most lucrative contract. He became the youngest player ever to hit 500 home runs, reaching the milestone in 2007. He was part of the Yankees' 2009 World Series championship over the Philadelphia Phillies, which was the first year of the new Yankee Stadium and Rodriguez's only world title. Toward the end of his career, Rodriguez was hampered by hip and knee injuries, which caused him to become exclusively a designated hitter. He played his final game in professional baseball on August 12, 2016.