2024 WBSC Premier12 rosters

Lore & Background

The 2024 WBSC Premier12 rosters were finalized by each nation's baseball federation, with announcement dates ranging from 9 October 2024 (Japan and Australia) to 8 November 2024 (South Korea). Managers included Benji Gil for Mexico, Mike Scioscia for the United States, and Hirokazu Ibata for Japan. Coaches were listed for each team, such as LaTroy Hawkins as bullpen coach for the United States and Ervin Santana as pitching coach for the Dominican Republic.

Reader's Guide

These rosters represent the official player selections for the 2024 WBSC Premier12, a major international baseball tournament. The rosters were subject to WBSC rules requiring a minimum of 13 pitchers and two catchers, ensuring balanced team composition. The announcement dates varied, with some teams like Cuba and South Korea announcing close to the tournament start, while others like Japan and Australia announced early. The inclusion of coaching staff highlights the strategic depth of each team, with roles such as bench coach, hitting coach, and pitching coach specified for many nations.

Did You Know?

• Mexico announced their squad on 10 October 2024 and their final squad on 9 November 2024.
• The United States roster was managed by Mike Scioscia, with LaTroy Hawkins as bullpen coach.
• Japan announced their squad on 9 October 2024, managed by Hirokazu Ibata.
• South Korea announced their squad on 8 November 2024, the latest of all teams.

The Great Expansion — From Twelve to Sixteen

The 2027 WBSC Premier12 marks a watershed moment in international baseball: for the first time in the tournament's history, sixteen national teams will compete rather than the twelve that filled the field in each of the three previous editions. The WBSC had originally intended to make this expansion happen at the 2023 edition, but the lingering disruptions of the COVID-19 pandemic forced the confederation to postpone the enlargement until 2027. The new structure was formally unveiled on 24 October 2024. Under the revised qualification pathway, the twelve highest-ranked nations as of 31 December 2025 earn automatic group-stage berths, while teams ranked 13 through 18 plus two wild-card entries battle in two separate qualifier tournaments to claim the remaining four spots. The first qualifier is scheduled for October 2026 at the Anella Olímpica in Barcelona, Spain, and the second will follow in November 2026 at the International Baseball and Softball Centre in Zhongshan, China. WBSC president Riccardo Fraccari confirmed in the wake of the 2024 final that these qualification windows would open in 2026.

Carrying the Crown — Chinese Taipei's 2024 Triumph

Going into 2027, Chinese Taipei enters as the reigning Premier12 champion, a title they claimed for the very first time in the tournament's short history. In the 2024 championship game, the island nation delivered a dominant 4-0 shutout over Japan, who were both the final-round hosts and the defending champions from the prior edition. The United States rounded out the podium, edging Venezuela 6-1 to secure third place. WBSC president Riccardo Fraccari publicly congratulated the new champions and used the occasion to confirm that the road toward the 2027 edition would begin with qualifiers in 2026. For Chinese Taipei, the 2024 victory represented a long-awaited breakthrough on the sport's biggest non-Olympic stage, and their status as defending champions adds a layer of narrative tension to the expanded 2027 field. The fact that Japan, the team they dethroned, will also be among the sixteen competing nations makes the rematch storyline one of the most anticipated threads heading into the next cycle.

A New Tournament Architecture

The 2027 format departs sharply from the structure fans saw in 2024. The sixteen participating teams are split into four groups of four for an opening round, with each squad playing three round-robin games against its group mates. The top two finishers from every group advance to a second round, where eight teams are re-divided into two new groups of four, again competing in a three-game round-robin. The two best from each of those groups then progress to a Super Round at the designated finals host, where they face the top two teams from the other group. Once the Super Round concludes, the first- and second-place teams meet in the gold-medal match, while the third- and fourth-place squads contest bronze. Group assignments will be revealed in April 2027. On the roster side, participating nations must lock in a 28-man squad by October 2027, and WBSC regulations mandate a minimum of thirteen pitchers and two catchers in every lineup, a constraint that will shape managerial decisions well before the first pitch is thrown.

Olympic Stakes and a Two-Dome Stage

Beyond the Premier12 trophy itself, the 2027 edition carries enormous weight for the 2028 Summer Olympics. On 9 February 2026, the WBSC announced that the top-ranked team from Asia and the top-ranked team from the Europe/Oceania region would each earn an Olympic berth, transforming the tournament into a de facto qualifying pathway for the Games. This elevates every single game, particularly for nations in those two regions, knowing that a strong finish could deliver a ticket to the Olympic stage. The event itself will be staged across two iconic venues in two countries: the Tokyo Dome in Japan and the Taipei Dome in Chinese Taipei. The dual-host arrangement underscores the WBSC's commitment to showcasing the sport in the two most baseball-culturally significant markets in the region. With sixteen teams, a three-stage elimination structure, and Olympic qualification riding on the outcome, the 2027 Premier12 is poised to be the most consequential edition in the tournament's four-year history.