HAEGIN announced on the 8th that it has released the first major update for 2026 Pro Baseball GO!. This update includes the introduction of a Fan Club system, the addition of new Legend cards, and a reorganization of Group Team Decks.

The core of this update is the introduction of the 'Fan Club' system, which allows users to engage more closely with professional baseball. The Fan Club includes 'Match Prediction' content, where users predict the results of actual KBO games held on the day to earn rewards. Users receive exclusive coins for correct predictions, which can be exchanged for essential items for team growth at the Fan Club shop. This is expected to provide a differentiated experience by adding the fun of direct participation to the enjoyment of watching baseball.

Content that stimulates the collecting desires of baseball fans has also been significantly bolstered. Nine new Legend player cards representing the KBO have been added, including KIA's Yoon Suk-min and Jang Sung-ho, Kiwoom's Park Byung-ho, NC's Eric Thames, and SSG's Choo Shin-soo. Additionally, three legendary uniforms symbolizing the golden age of past professional baseball—Binggrae Eagles (1986), Cheongbo Pintos (1987), and Pacific Dolphins (1989)—along with a special KIA (2012) uniform, have been updated to increase their collectible value.

System improvements were also implemented. The existing team deck system, centered on single clubs, has been completely reorganized into 'Group Team Decks' that span the history of clubs, such as 'Bears' (Doosan/OB), 'Tigers' (KIA/Haitai), and 'Twins' (LG/MBC Blue Dragons). Other major improvements for user convenience include an auto-retry feature for stage defeats, expansion of team training up to 1,800 levels, an increase in maximum guild capacity to 50 members with enhanced management functions, and an expansion of storage capacity to 800 slots. Further updates include specialized motions and face additions for some players, as well as improvements to the data visualization UI.

A HAEGIN representative stated, "This first major update focused on introducing 'Fan Club' match prediction content that allows baseball fans to actively enjoy the game alongside live broadcasts," adding, "Through Group Team Decks that connect the history of the KBO and the recruitment of Legend players, 2026 Pro Baseball GO! will establish itself as a truly essential app for the baseball season."