[1] On defense between the two clubs, he played 34 games as a first baseman and 10 as a catcher, committing two errors; and making 39 assists, and 326 putouts.

[7] Choi sustained a fractured fibula in the first game of Mariners' spring training in 2015, as he leaped at first base to try to save an errant throw from farmhand Tyler Smith at shortstop.

On May 15, Choi cleared waivers and accepted an outright to the Salt Lake Bees of the Triple–A Pacific Coast League, thus remaining with the Angels.

Choi hit his first career major league home run off Texas Rangers starter A. J. Griffin at Angel Stadium of Anaheim on July 19, 2016.

[14] Choi signed a minor league contract with the New York Yankees, receiving a non-roster invitation to spring training.

[21] On June 9, Choi hit his first career grand slam as a pinch-hitter in the sixth inning of a Brewers-Phillies game.

[citation needed] One day after his grand slam with the Brewers, Choi was traded to the Tampa Bay Rays for infielder Brad Miller and cash considerations.

In his first full year with the Rays, Choi established himself as a fan favorite due to his performance and attitude on the field.

[28] On July 26, 2020, Choi made his first appearance as a switch hitter in his career, batting right-handed twice against left-handed Toronto Blue Jays pitcher Anthony Kay.

In game one of the American League Division Series against the New York Yankees, he hit a two-run home run against Gerrit Cole.

[36] On August 1, 2023, Choi and Rich Hill were traded to the San Diego Padres in exchange for Alfonso Rivas, Estuar Suero, and Jackson Wolf.

[37] After going hitless in seven games for the Padres, Choi was placed on the injured list with a left rib strain on August 14.

On February 16, 2024, Choi signed a minor league contract with the New York Mets that included an invitation to spring training.