Of course, to be fair to the Academy side of the argument, we are talking about how playing multiple sports can help players master new skills in soccer...which does not necessarily address those who have already risen to mastery of their basic skills and are looking to further fine-tune them in a concentrated environment. I wouldn't suggest baseball or basketball as a way to turn a great soccer player into a world-class soccer player, but they can be a big help in developing the skills that made them great players in the first place.