The selection should be an expression and selectionArgs should have as many elements as there are ? literal placeholders in selection.
Your selection is not an expression and does not have any ? but you have one element in selectionArgs.
You probably want something like:
String selection = PlayerEntry.COLUMN_NAME_PLAYER_NAME + "=?";
to make it an expression that matches the player name column agains the literal you’re binding in selectionArgs[0].