[3] Adell was considered one of the top prospects for the 2017 Major League Baseball (MLB) draft.

[7] Adell began his professional career in June 2017 with the AZL Angels, and after batting .288/.351/.542 with four home runs, 21 RBIs, and 10 stolen bases, he was promoted to the Orem Owlz.

On August 1, Adell was promoted to the Salt Lake Bees of Triple–A Pacific Coast League.

[16] And also, on October 10, he was selected for the United States national baseball team in the 2019 WBSC Premier 12.

[21] On August 29, Adell hit his first major league home run against Seattle Mariners pitcher Justus Sheffield.

[23] He made his season debut the following day, going 3-for-4 with two doubles, three RBIs and a stolen base against the Texas Rangers.

[26] In a 6-game stretch in April, Adell homered in all 6 games consecutively, setting an Angels franchise record.

[31] Adell played in 130 games for the Angels in 2024, slashing .207/.280/.402 with 20 home runs, 62 RBI, and 15 stolen bases.