[1] The league is overseen by the Royal Spanish Baseball and Softball Federation (RFEBS).

In the second of each pair of games, the pitcher must be eligible for the Spain national baseball team.

Since 2012, after the regular season, the two first qualified team play the Finals in a best-of-five playoffs format.

The last qualified is relegated to Primera División A, composed in 2012 by only six teams.

In other way, the first four qualified teams, will play for the Copa del Rey de Béisbol of the next season.