You can begin playing Blitzball games, exhibition matches and tournaments anytime after you have completed the events in Luca fairly early in the game. The first Save Sphere that you encounter along the Mi’ihen Highroad will give you a brief overview of how to recruit players and play Blitzball.
You can recruit players by pressing the 
Button while talking to NPCs (Non-Playable Characters) as you travel through Spira. Only certain NPCs can be recruited and it is much easier to recruit players later on in the game - especially the good Blitzball Players. It is recommended that you hold off on playing Blitzball until after you have obtained the Airship.
There are a number of very important rewards that you can obtain by playing Blitzball games (including Wakka’s Celestial Weapon, 
World Champion). The sections below provide an outline of how to go about recruiting players, some general Blitzball tips and a list of the rewards that you can obtain by playing.
Recruiting Players
Where to find the strongest Blitzball players and offering contracts to draft a strong Blitzball team.
Strategy and Tips
Some strategies and tips that you can use to defeat opposing teams in Blitzball tournaments and league matches.
Prizes
A list of the most important prizes you can win by coming in first in tournament or league matches.
Show Off!
You will receive the Show Off! Trophy after you have won your first Blitzball tournament.
Blitzball Master
You will receive the Blitzball Master Trophy once you have obtained the Attack Reels, Status Reels and Auroch Reels prizes from Blitzball Tournaments. Check out the Prizes list using the link above for more information.
