In 1997, the amateur
Chinatrust Whales Baseball Team was professionalized and became the seventh member of
Chinese Professional Baseball League; however, because Taiwan forbids financial institutions to invest in unrelated markets, the ownership of the team had to be transferred to
Koos Group (和信集團), which was also the owner of Chinatrust, thus the team was named KG Whales when it began its first season. Initially, the Whales played their home games at the
Chiayi Baseball Field. The team did not have any notable success over the course of its history, with only two appearances in the Championship series, winning only a single game over the course of those two series while dropping eight. In 2002, because of the split of Chinatrust and the Koos Group, the ownership of the Whales were transferred back to Chinatrust and renamed Chinatrust Whales. The organization disbanded after the 2008 season. Although owned by the same parent corporation, Chinatrust Whales and
Chinatrust Brothers are two separate organization with separate franchise histories. Chinatrust acquired the Brothers organization from Brother Hotel in December 2013, five years after the Whales folded. ==Final roster==