Originally Posted by MrRedLegger
As with most romance languages, it needs the article "Los" to make it a plural noun. Just "Rojos" would be an adjective describing things that are red.
They aren't constructing a sentence with it. In this case, it is quite clearly a proper noun, like the "GREEN" on Dick Green's jersey back.
Check out jerseys from winter leagues. The only one I remember with "Los" is "Los Mochis", because "Los Mochis" is the name of the town (the team nickname is Caņeros).
For example Bravos de Margarita is a Venezuelan Winter League team. Bravos can also be an adjective. The uniforms do not carry a "Los"
Newspaper headlines will omit the "Los" as in
Rojos 5, Cerveceros 1
They could ask the latin players how they prefer it, with or without "los" , but I suspect they don't care much either way, unlike other people.