The Lotte Giants made their KBO League debut against the Haitai Tigers at Gudeok Baseball Stadium on March 28, 1982. They defeated the Tigers 14–2, but finished the year in fifth place out of six teams with a.388 winning percentage. Choi Dong-won, Yu Du-yeol, and Sim Jae-won of the Korea national baseball team postponed joining the Giants to play for the country in the 1982 Amateur World Series held in Seoul. In 1984, the Giants won their first Korean Series title in the third season after the KBO League was launched. They beat the Samsung Lions 4–3 in the Korean Series. They were led by Choi Dong-won, one of the most dominant pitchers in the Korea Professional Baseball league, who finished the 1984 season with 27 wins, 223 strikeouts, and a 2.40 ERA and won the regular seasonMVP Award. In the 1984 Korean Series, he appeared in five out of seven games, had a 4–1 record, and pitched 40 innings in ten days. The Giants made one of the biggest trades in KBO League history after the 1988 season when they sent star pitcher Choi Dong-Won and Kim Yong-chul to the Samsung Lions for star hitter Jang Hyo-jo and star pitcher Kim Si-Jin.
1990s
The Giants made it back to the Korean Series in 1995 and 1999, losing both times. They have not appeared in the Korean Series since 1999.
2000s
From 2001 to 2007 the Giants did not qualify for the postseason, finishing in last place four consecutive years. In mid-season 2001 the Giants' manager Kim Myung-seong, who had been in charge of the team since 1998, died of a heart attack. He was replaced by Woo Yong-deuk. Late in 2007, the Giants signed American Jerry Royster to become the manager of the Giants, making him the first-ever non-Korean to take the helm of one of South Korea's professional baseball clubs. Royster served as the Giants' manager through the 2010 season, guiding the team to the playoffs all three years he was at the helm.
Popularity and attendance
The Giants are the most popular team in the Korea Baseball Organization league. According to a Gallup Korea's survey conducted in 2011, the Giants were chosen as the most popular team three times in a row. They attracted over 1 million fans to Sajik Baseball Stadium in 1991 for the first time in league history. In the 2009 season, they set the all-time record of home attendance of 1,380,018 fans. In the 2011 season, they also led the league in the total home attendance with 1,358,322 fans at 67 home games. The average attendance was 20,273 fans per game, meaning the stadium was 71 percent full on average per game. From 2008 to 2011, they drew over 1 million fans four years consecutively, which was the first time in Korean professional baseball history.
Season-by-season records
Current roster
Retired numbers
The club's first retired number is Choi Dong-won's squad number 11. He was one of the top pitchers in the Korea Professional Baseball league, playing for the Giants between 1983 and 1988, and winning the KBO MVP award in 1984. Choi died of cancer in 2011.