- December 10: The Japanese national team'wins the 2023 Asian Championship. Motoki Mukoyama is named MVP.
- December 7: Josh Naylor wins the Tip O'Neill Award as the best player from Canada over the previous season.
- December 6: Joe Castiglione wins the Ford C. Frick Award.
- December 5: Gerry Fraley wins the BBWAA Career Excellence Award.
- December 3: Jim Leyland is elected to the Hall of Fame by the Veterans Committee.
- November 28: Yoshinobu Yamamoto wins the 2023 Pacific League MVP, Shoki Murakami becomes the first player to win the Central League MVP and Rookie of the Year in the same season, and the 2023 PL Rookie of the Year is Shunpeita Yamashita.
- November 17: Erick Fedde is named KBO MVP for 2023. Dong-ju Moon wins Rookie of the Year.
- November 16: Ronald Acuña Jr. wins the National League MVP Award by unanimous vote, as does Shohei Ohtani in the American League.
- November 15: Gerrit Cole wins the American League Cy Young Award by unanimous vote, while Blake Snell is the winner in the National League.
- November 14: Skip Schumaker is named NL Manager of the Year for 2023, while Brandon Hyde is the AL winner.
- November 14: Akinobu Okada wins the Matsutaro Shoriki Award for 2023.
- November 13: Corbin Carroll wins the Rookie of the Year Award in the National League and Gunnar Henderson wins the honor in the American League.
- November 13: The LG Twins win the 2023 Korean Series for their first title in 29 years. Ji-hwan Oh is named Korean Series MVP.
- November 12: The Wei-Chuan Dragons win the 2023 Taiwan Series, their first championship since returning to the loop. Jo-Hsi Hsu is the Series MVP.
- November 5: The Hanshin Tigers beat the Orix Buffaloes to win the 2023 Japan Series. The Series MVP is Koji Chikamoto.
- November 1: The Texas Rangers defeat the Arizona Diamondbacks in the 2023 World Series; Corey Seager is named World Series MVP.
- October 31: 48-year-old Enorbel Márquez wins the Bundesliga-1 North MVP for the first time, while Jared Mortensen wins the South MVP.
- October 30: Yoshinobu Yamamoto becomes the second pitcher (and first in 65 years) to win three straight Sawamura Awards.
- October 28: Colombia wins Gold in the 2023 Pan American Games, their first Pan American Games Gold in baseball.
- October 24: The Arizona Diamondbacks win the National League pennant, defeating the Philadelphia Phillies in seven games in the NLCS; Ketel Marte is the NLCS MVP.
- October 23: The Texas Rangers win the American League pennant, defeating the Houston Astros in seven games in the ALCS; Adolis García is named the ALCS MVP.
- October 22: The Amsterdam Pirates win the 2023 Holland Series. Jorrit Penseel is named Series MVP.
- October 15: The K. Deurne Spartans win the Belgian Series.
- October 7: South Korea wins Gold at the Asian Games, their fourth in a row.
- October 2: Yoshihisa Hirano saves his 250th game between NPB and MLB to join the meikyukai.
- October 1: Spain wins the 2023 European Championship, their first European Championship title since 1955. Wander Encarnación is named European Championship MVP.
- September 30: The Norfolk Tides win the Triple-A National Championship. Colton Cowser is named MVP.
- September 26: Hall of Famer Brooks Robinson dies at age 86.
- September 17: The Heidenheim Heideköpfe win their 7th Bundesliga-1 championship. Jared Mortensen is the MVP of the finals.
- September 17: The Montpellier Barracudas win the French Division I title for the first time in 28 years. Ben Couvreur is named finals MVP.
- September 15: The Pericos de Puebla take their third Mexican League pennant.
- September 10: Japan wins the 2023 U-18 Baseball World Cup for their first world junior title.
- September 9 Yoshinobu Yamamoto throws the 100th no-hitter in Nippon Pro Baseball history.
- September 9: The Rättvik Butchers win their 4th Elitserien title.
- September 8: Bologna sweeps the 2023 Italian Series. Ricardo Paolini is named Series MVP.
- August 27: Draci Brno wins their 24th Extraliga title.
- August 27: El Segundo, CA wins the 2023 Little League World Series, defeating Willemstad, Curaçao in the final game.
- August 26: Yohei Oshima joins the meikyukai in his 14th season, tying the record for the fastest there.
- August 11: The Leñadores de Las Tunas win the 2022-2023 Cuban Serie Nacional. The finals MVP is Keniel Ferráz.
- August 9: Michael Lorenzen pitches a no-hitter in only his second start after being acquired by the Phillies in a trade.
- August 1: Framber Valdéz of the Astros pitches a no-hitter in a 2-0 win over Cleveland.
- July 23: The Marlins Puerto Cruz win their third straight Spanish Baseball League title.
- July 20: The Pacific League sweeps the 2023 NPB All-Star Games. Yuki Yanagita is Game 1 MVP while Chusei Mannami is Game 2 MVP.
- July 11: The National League wins the 2023 All-Star Game, 3-2 over the American League; Elias Díaz wins the Ted Williams Award as the game's MVP.
- July 10: Vladimir Guerrero Jr. wins the annual Home Run Derby staged at T-Mobile Park; he joins his father, Vladimir Guerrero, who won the event in 2007.
- July 9: Paul Skenes of Louisiana State University is selected first overall by the Pirates in the 2023 amateur draft, immediately followed by his teammate, OF Dylan Crews, who goes to Washington.
- July 8: Matt Manning, Jason Foley and Alex Lange combine to pitch a no-hitter for the Detroit Tigers.
- June 30: The Mexican national team wins their first Gold in an international tournament, after 10 Silver Medals in the past 97 years, winning the 2023 Central American and Caribbean Games.
- June 28: Domingo Germán of the New York Yankees throws the 24th perfect game in major league history.
- June 26: Louisiana State University wins the 2023 College World Series, defeating the University of Florida in the final game; Paul Skenes is named the tournament's MVP.
- June 25: Dylan Crews wins the Golden Spikes Award.
- June 11: HCAW wins the 2023 European Champions Cup, their first European title. Victor Draijer wins event MVP honors.
- June 10: Angelo State University wins the 2023 Division II College World Series.
- June 8: The University of Lynchburg wins the 2023 Division III College World Series.
- May 31: Japan wins the 2023 Women's Baseball Asian Cup. Akino Tanaka is named MVP.
- April 5: Yun-Wen Chen gets his 130th save, breaking Yueh-Ping Lin's CPBL career record.
- March 21: Japan wins the 2023 World Baseball Classic, defeating the United States, 3-2, in the final game. Shohei Ohtani is named tournament MVP.
- March 13: Four pitchers for the Puerto Rican national team - José De León, Yacksel Rios, Edwin Diaz and Duane Underwood - combine for an eight-inning perfect game against Israel in the 2023 World Baseball Classic.
- February 24: Alex Hall wins the Helms Award for the 2022-2023 Australian Baseball League.
- February 10: The Tigres del Licey win their 11th Caribbean Series title, more than any other team. César Valdéz is named Caribbean Series MVP.
- February 9: Ramón Hernández, Luis Raven, Robert Pérez and José Antero Núñez are inducted into the Caribbean Baseball Hall of Fame.
- February 4: The Adelaide Bite win the 2022-2023 Australian Baseball League. Jordan McArdle is the finals MVP.
- February 1: Jesse Barfield, Denis Boucher, Rich Harden and Joe Wiwchar are elected to the Canadian Baseball Hall of Fame.
- January 30: The Leones del Caracas take their record 18th Venezuelan League title, but first in 13 years.
- January 28: The Cañeros de Los Mochis win their first Mexican Pacific League championship in 20 years.
- January 25: The Indios de Mayagüez win their 19th Puerto Rican League pennant.
- January 24: Scott Rolen is elected to the Hall of Fame.
- January 18: The Tigres del Licey win their record-breaking 23rd Dominican League title.
- January 13: Alex Ramirez, Randy Bass and Yuji Koseki win induction in the 2023 Japanese Baseball Hall of Fame Election.
- January 13: The British Baseball Hall of Fame inducts Richard Klijn, Frank Parker Jr., Ryan Trask, Stephan Rapaglia, Doreen Megson and Brian Holland.
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