'Sending all my love to him and his family, and wishing him the best for the future'.
"I'm retiring from the game with my head held high having done everything in my power over these past 13 months to have given myself every opportunity to return to the pitch", Mason said in a statement. He will always be a special player for me because he represents the change in all the processes when we arrived at Tottenham.
Mason has also revealed ambitions to coach at his boyhood club after ending his playing career.
After undergoing a successful operation, Mason spent the past year rehabilitating in an attempt to return to professional football.
Mason was 23 before getting his break at Spurs and had been on loan at five different clubs in England and France in the seasons before Pochettino's arrival.
"It was hard for him in the beginning because he struggled to cope with the training sessions, because it was very tough".
"I am so proud to have come through the ranks to play for my club, the club I love", said Mason, a £13m signing from Tottenham by the Tigers in August, 2016. After only a few training sessions, he understood everything, [including] what another player needs a year to understand - the tactics, the movement, the concepts.More news: Social Media Erupts With Shaun White Gold Medal Win
More news: Chicago Police Officer Shot and Killed in Downtown
More news: French president Emmanuel Macron to reintroduce national service to France
"Don't worry Ryan, you're going to be a successful person outside of the club."
Mason's injury was very bad, but it's good to know that he has the full support of the club that gave him his chance for Premier League football, just as I'm sure he has the full support at Hull City.
"I've got a son and a handsome fiancee around me, so these are the sort of things that mean more to you than football when things are put into perspective", he said.
'The doc, to be fair to him, had waited for the right moment to talk me through the accident and the operation.
"When we were at Spurs, we thought he was the one that was really going to scoot on and be everything we thought he had the ability to be".
"He is 26 but he is an wonderful person and has an incredible football brain", he added.