| National Baseball League | |
| Current Season: | 2024 British baseball season |
| Last Season: | 2023 |
| Upcoming Season: | 2024 |
| Sport: | Baseball |
| Teams: | 6 |
| Country: | United Kingdom |
| Champion: | London Mets |
| Champ Season: | 2023 |
| Most Successful Club: | London Mets |
The National Baseball League (NBL) is an amateur baseball league organised by the British Baseball Federation (BBF). The league is the top level of baseball in the United Kingdom, with the league champions also being named the overall National Champion in the United Kingdom.[1] There is no official system of Promotion-and-Relegation; however several teams have moved up and down the structure freely.
The NBL has fluctuated in size, with multiple teams joining and subsequently leaving. The BBF also allows multiple teams to come from the same club, as evident with the London Mets and Capitals both drawing from the same pool of players (although there are restrictions on players from a club playing with multiple teams in the same season).
| Bournemouth Bears | Ferndown, Dorset | |
| Essex Arrows | Waltham Abbey, Essex | |
| London Capitals | Haringey, London | |
| London Mets | Haringey, London | |
| Sheffield Bruins | Sheffield, South Yorkshire | |
| BC Vetra | Saltford, Somerset |