Minor League Baseball
Hierarchy of professional baseball leagues affiliated with Major League Baseball
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| 2025 | Eight independent leagues are active, with four recognized as MLB Partner Leagues. |
| 2025 | Diamond Baseball Holdings acquires Dayton Dragons, extending its minor league baseball team portfolio. |
| 2025 | Team renamed to Oklahoma City Comets, marking the latest transformation in the team's long history. |
| 2025 | Hickory Crawdads are set to join the Carolina League, continuing the league's tradition of team evolution and expansion. |
| 2024 | Chad Patrick of Nashville Sounds (Milwaukee Brewers organization) wins International League Pitcher of the Year Award with a 14-1 record and 2.90 ERA, striking out 145 batters |
| 2024 | Charlie Blackmon completed his 14-season career with the Colorado Rockies, becoming the most recent player to spend an entire MLB career with one franchise. |
| 2024 | Binghamton Rumble Ponies win their fifth Eastern League Pitcher of the Year Award. |
| 2024 | Diamond Baseball Holdings continues its expansion by acquiring the Arkansas Travelers, Binghamton Rumble Ponies, Brooklyn Cyclones, Charlotte Knights, Harrisburg Senators, Inland Empire 66ers, Modesto Nuts, Omaha Storm Chasers, Rancho Cucamonga Quakes, Syracuse Mets, Tri-City Dust Devils, and Winston-Salem Dash minor league baseball teams. |
| 2024 | FCL Tigers won their 2nd league championship |
| 2024 | No major league clubs are currently fielding more than one team in the Florida Complex League. |
| 2024 | Carson Williams from the Montgomery Biscuits, representing the Tampa Bay Rays organization as a shortstop, wins the Top MLB Prospect Award. |
| 2024 | The Mississippi Braves franchise prepares to relocate to Columbus, Georgia, signaling continued evolution of the league's team composition. |
| 2024 | Southern League implements a new salary cap structure, setting a maximum of US$1,360,000 on player compensation and a minimum salary of $30,250 per player. Special provisions are made for players aged 23 and younger, with 50% of their salary counting towards the cap (up to $200,000 total). |
| 2024 | Pacific Coast League implements a salary cap of US$1,610,000 per club, with a minimum player salary of $35,800. Players aged 23 and younger have a special cap calculation where only 50% of their salary counts (up to $250,000). |
| 2024 | Team becomes Oklahoma City Baseball Club. |
| 2024 | Implemented new salary cap regulations, setting a maximum of US$1,610,000 on player compensation with specific provisions for younger players. |
| 2024 | Minor League Baseball implemented new roster size restrictions, limiting major league clubs to 165 players on domestic affiliate rosters during the minor league season, with a 175-player limit during the offseason. |
| 2024 | Seven independent leagues are active, with four functioning as MLB Partner Leagues. |
| July 2024 | New playoff format introduced where four teams (three division winners and one wild card) qualify, with seeding based on winning percentage and a single-game semi-final followed by a best-of-three championship series. |
| July 2024 | MiLB announces the Hub City Spartanburgers will join the league in 2025, replacing the Hickory Crawdads. |
| July 2024 | MiLB announced that the Hickory Crawdads will join the Carolina League in 2025, replacing the Down East Wood Ducks. |
| July 2024 | Arizona Complex League and Florida Complex League seasons conclude in late July, allowing players to potentially be promoted to Single-A for the final two months of the professional baseball season. |
| May 2024 | Season format changed to start in early May (previously mid-June), with a new conclusion in late July (previously late August). |
| May 2024 | Arizona Complex League and Florida Complex League seasons begin in early May, marking a change from the traditional mid-June start. |
| 2023 | Robert Gasser of Nashville Sounds (Milwaukee Brewers organization) wins International League Pitcher of the Year Award with a 9-1 record and 3.79 ERA, striking out 166 batters |
| 2023 | Somerset Patriots win their first Eastern League Pitcher of the Year Award. |
| 2023 | Diamond Baseball Holdings significantly increases its team ownership, acquiring the Albuquerque Isotopes, Altoona Curve, Birmingham Barons, Fresno Grizzlies, Hickory Crawdads, Lansing Lugnuts, Louisville Bats, New Hampshire Fisher Cats, Norfolk Tides, Salem Red Sox, Springfield Cardinals, St. Paul Saints, Tulsa Drillers, and Vancouver Canadians. |
| 2023 | FCL Braves won their 3rd league championship |
| 2023 | Junior Caminero from the Montgomery Biscuits, representing the Tampa Bay Rays organization as a third baseman, wins the Top MLB Prospect Award. |
| 2023 | Pacific Coast League introduces a new championship format, splitting the regular season into two halves. The winners of each half meet in a best-of-three series to determine the league champion. |
| 2023 | International League introduced a new championship format, splitting the regular season into two halves, with the winners of each half meeting in a best-of-three series to determine the league champion. |
| 2022 | Acquired Midland RockHounds and Portland Sea Dogs, and Wichita Wind Surge. |
| 2022 | Greg Weissert of Scranton/Wilkes-Barre RailRiders (New York Yankees organization) wins International League Pitcher of the Year Award with a 2-1 record, 18 saves, and 1.69 ERA, striking out 70 batters |
| 2022 | The California League re-assumed its original name after the temporary renaming in the previous season. |
| 2022 | League reverted back to the Eastern League name. |
| 2022 | Akron RubberDucks win their third Eastern League Pitcher of the Year Award. |
| 2022 | Diamond Baseball Holdings expands its portfolio by acquiring the Midland RockHounds and Wichita Wind Surge minor league baseball teams. |
| 2022 | Ownership of Diamond Baseball Holdings shifted from Endeavor to Silver Lake, who purchased the company for $280 million. |
| 2022 | The Texas League reassumed its original name, returning to its traditional branding after the brief temporary renaming. |
| 2022 | FCL Yankees won their 13th league championship |
| 2022 | The league reassumes its original South Atlantic League (SAL) name after the 2021 temporary rebranding. |
| 2022 | Renamed back to South Atlantic League after MLB acquired historical minor league names. |
| 2022 | Southern League returned to its original name after one season as Double-A South. |
| 2022 | Taj Bradley from the Montgomery Biscuits, representing the Tampa Bay Rays organization as a pitcher, wins the Top MLB Prospect Award. |
| 2022 | Major League Baseball adopted the universal designated hitter (DH) rule, eliminating previous variations in DH usage for Pacific Coast League teams. |
| 2022 | Sugar Land Space Cowboys began competing as a member of the Pacific Coast League following their transition from the Atlantic League. |
| 2022 | League modified championship format to have division champions meet in a single game to determine the league champion. |
| 2022 | The Carolina League reassumed its original name after the 2021 temporary rebranding as Low-A East. |
| 2022 | The official classification name changed to Single-A, standardizing the league's nomenclature. |
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This contents of the box above is based on material from the Wikipedia articles Florida Complex League, Minor League Baseball, Diamond Baseball Holdings, International League Pitcher of the Year Award, Pacific Coast League, South Atlantic League, California League, Eastern League Pitcher of the Year Award, Texas League, List of Major League Baseball players who spent their entire career with one franchise, International League, Carolina League & Southern League (1964–present), which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.