Emergency keepers - why are they allowed?

When you can't have emergency strikers/midfielders/defenders?
Genuine question
Genuine question
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bluej wrote:Think because most outfield players at this level could play most outfield positions to an extent - for example putting midfielders up front like Everton did. [highlight]Goalkeepers are generally one position players[/highlight] and you don't get any outfield players who double up as keepers.