Mitch Haniger is a professional baseball outfielder born on December 23, 1990, in Mountain View, California.[3] He played college baseball at Cal Poly San Luis Obispo, where he was named the 2012 Big West Conference Player of the Year and led the conference in home runs (13), RBIs (64), and slugging percentage (.626).[8] The Milwaukee Brewers selected him in the first round (38th overall) of the 2012 MLB Draft.[1] Haniger made his Major League debut with the Arizona Diamondbacks in 2016 before being traded to the Seattle Mariners in November 2016 along with infielder Jean Segura in exchange for Ketel Marte and Taijuan Walker.[1] He appeared in six seasons with Seattle across three separate stints (2017-2019, 2021-2022, 2024), with a one-year stint with the San Francisco Giants in 2023.[2] His breakout season came in 2018 when he made the American League All-Star team and finished 11th in AL MVP voting.[1] That year, he hit .285 with 26 home runs, 93 RBIs, and a .859 OPS across 157 games, accumulating 6.5 Wins Above Replacement.[1] In 2021, Haniger had another strong season, hitting 39 home runs (5th in the AL) and driving in 100 runs.[3] Over his career, Haniger recorded 688 hits with a .250 batting average and 130 home runs across 2,755 at-bats.[3] His 60 home runs at T-Mobile Park rank fifth-most in the ballpark's history, and his eight walk-off hits are the most in Mariners franchise history.[1] He also received AL MVP votes in both 2018 and 2021, and helped the Mariners reach the postseason in 2022, their first appearance since 2001.[1] In November 2025, the Mariners released Haniger at age 34, concluding his tenure with the organization.[1]