On 22 February 1982, the Giants became professional and moved to Busan, the second-largest city in South Korea.

The Lotte Giants made their KBO League debut against the Haitai Tigers at Gudeok Baseball Stadium on 28 March 1982.

Choi Dong-won, Ryu Du-yeol and Sim Jae-won of the South Korea national baseball team postponed joining the Giants to play for the country in the 1982 Amateur World Series, held in Seoul.

[4] The Giants made one of the biggest trades in KBO League history after the 1988 season when they sent their star pitcher Choi Dong-won and Kim Yong-chul to the Samsung Lions, and received hitter Jang Hyo-jo and pitcher Kim Si-kin.

[9] According to a Gallup Korea's survey conducted in 2011, the Giants were voted as the most popular team three times in a row.

Described as one of the top pitchers in the Korea Professional Baseball league, he played for the Giants between 1983 and 1988, and won the KBO MVP award in 1984.

[1] In 2022, the club retired the number 10 in honour of Lee Dae-ho, who spent more than 15 seasons with the Giants.