Just read this on a different, but weirdly similar, site. How did I not know that goalkeeping was initially a hybrid of basketball and Mixed Martial Arts?
Roose developed a unique style of goalkeeping. At this time goalkeepers could handle the ball anywhere inside their own half. Law 8 stated: "The goalkeeper may, within his own half of the field of play, use his hands, but shall not carry the ball." Roose developed the habit of bouncing the ball up to the half-way line before launching an attack with a long kick or a good throw. As Spencer Vignes points out in his book on Leigh Roose: "This was perfectly within the letter of the law, though few goalkeepers risked doing it for fear of either leaving their goal unattended or being streamrollered by a centre-forward. It became a highly effective, direct way of launching attacks and Leigh used it to his side's advantage whenever possible."