The midfielder has become a regular under the Argentine at Tottenham Hotspur.
Since Pochettino took over at White Hart Lane things have gone on the up for Mason. He looked set to be on his way out of the club previously but he is now a regular in the Tottenham first-team and an England international.
Mason believes that if the Argentine was at the club when he first made his breakthrough at the club, he would have played a lot more games at White Hart Lane. He told Sky Sports:
“He's basically a nice fella who knows his football, I can't thank him enough. A lot of others would not have chucked me in.
"I think I'd have played 50 or 60 games by now if he'd been manager earlier. He puts his faith in young players - he's improved us as people and as players."
Mason had struggled in his early days at Tottenham, with loan spells at Yeovil Town, Doncaster Rovers, Millwall, Lorient and Swindon Town all having mixed success.
But since Poch threw him back in the first-team fold against Nottingham Forest in the League Cup last September, a game in which he scored a screamer, Mason has become a regular in the Tottenham first-team and he has certainly done it the hard way.
Poch will be hoping that Mason and co can inspire Tottenham to a first win of the season tomorrow at the Stadium of Light.