The standard mode and player per team in Call of Duty: Warzone is trios.
Infinity Ward opted for trios for how the gameplay works in Call of Duty: Warzone and how large the map is. There’s 50 teams of 3 for a total of 150 players.
And trios is the only mode available in Call of Duty: Warzone. Infinity Ward does not have solos or duos options in game at launch. The reasoning for this is to ensure quality matchmaking and not separating matchmaking into many different pools with so many options or combinations of team styles.
Players can opt to play on their own or with a duo through Squad Fill settings, but they will be competing against standard trio teams in the same matchmaking pool.
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