He said: “For a young black man to be denied playing for his country just because of the colour of his skin… in a time when Jack played in the 1920s, he was the only black professional footballer playing at the time so you can imagine the abuse that he would have received up and down the country, so he would have had thick skin.
“He was the first black player to be selected for England and that wasn’t taught in schools, that wasn’t taught by anyone, that was like forgotten history… he was a proper trailblazer.”
Mr Mauge said there was “still a long way to go” to tackle racism in and outside of the game.
“We have to get this right, racism isn’t a football problem, it’s a social problem, and until we start looking at the social aspects of racism and coming together and talking about racism, you know we’ve still got a lot of work to be done,” he said.
Football Association chair, Debbie Hewitt, said: “Jack Leslie is a true football legend who, through his own adversity, has positively shaped attitudes and behaviours to identify and remove discrimination from football.
“The FA is awarding Jack a posthumous honorary cap, to recognise his unique contribution and set of circumstances – and to right the historical wrong.”
Ms Hewitt said the FA would continue to make English football “more diverse and inclusive and a game for all”.
“We owe a huge debt of gratitude to Jack and to his family for comprehensively and consistently driving positive change through football,” she said.