What does baller mean on Match Attax cards?

In the trading cards for association football made by Match Attax, some players are described as ballers. See https://www.footballcardsdirect.com/wp-content/uploads/2019/03/EPLMAE1819-BL01.jpeg for example. This must be in British English.

What does it mean?

Solution 1:

I can't speak specifically to your Match Attax cards, but baller is a term familiar in the US, which may have floated across the pond to you and been picked up by the producer of those cards. I believe it originated with basketball (I recall hearing it in that context over the years) but it was adopted wholeheartedly by (American) football.

TFD Online gives this definition:

baller n
1. (Ball Games, other than specified) slang a ball-game player, esp in basketball

It has enough currency that HBO turned it into (at last count) a five-season program (see Ballers).

I do recall hearing ball used as a verb (which is how baller might have come into being) in the 1997 movie Any Given Sunday in which the lead character, played by Jamie Foxx, compares himself to someone by saying "But can he ball?" Note that this could be a double-entendre, since ball has long been a slang term for performing coitus.

ball v.tr. [also v.intr.]
2. Vulgar Slang To have sexual intercourse with.
_{TFD Online}