The Northern Irishman was a standout performer for the Whites last season, and has seen his efforts rewarded with a fresh three-year contract at Elland Road.
Dallas has been a virtual ever-present during Leeds’ rise back to the top table of English football under Marcelo Bielsa, and took to life in the Premier League like a duck to water last term.
Now, with his future assured, he is eager to kick on again.
“It hasn’t seemed that long ago but when I sit back and think about everything that’s happened since then, it’s been a crazy journey, a crazy few years,” he said.
“Obviously I’m absolutely delighted to be signing a new deal, I’ve had what is it five seasons, six seasons now, I can’t even remember I’ve enjoyed myself that much.
“Football is a rollercoaster. I always believed in myself, that I was good enough to make a name for myself at this club.
"At times you don’t perform, that’s part and parcel of being a player, you have the set-backs to improve and keep learning.
“I’ll be the first to admit in the first few seasons here I didn’t perform as well as I could have and in these last few seasons the fans have seen what I’m capable of.
“This is where I want to be, I’ve always said that, I want to be at this club."
We’ve gathered the best of today’s Premier League speculation below…
1. Hincapie open to summer move
Ecuador's teenage defender Piero Hincapie has admitted that he could be open to a move this summer. Newcastle United are among the teams being linked with a transfer. (ESPN) (Photo by Pedro Vilela/Getty Images) Photo: Pedro Vilela
2. Toon could sell Schar and Gayle
Newcastle United could be tempted to cash in on both Fabian Schar and Dwight Gayle this summer. (The Athletic) (Photo by Justin Setterfield/Getty Images) Photo: Justin Setterfield
3. Albion in late Tavares bid
Nuno Tavares is set to become an Arsenal player in the coming days, despite late attempts from Brighton & Hove Albion to snatch the player away from their Premier League rivals. (A Bola) (Photo by Milos Bicanski/Getty Images) Photo: Milos Bicanski
4. Robert set for Burnley trial
Burnley have emerged as contenders to sign Airdrie winger Thomas Robert, son of former Newcastle United star Laurent. The youngster is set for a two-week trial at Turf Moor. (Lancs Live) (Photo by Stu Forster/Getty Images) Photo: Stu Forster
5. Bernardo leaves Brighton
Brighton defender Bernardo has joined Red Bull Salzburg on a permanent deal, subject to international clearance. (Various) (Photo by Andy Rain - Pool/Getty Images) Photo: Pool
6. Heaton joins Manchester United
After two years at Aston Villa, former Burnley goalkeeper and captain Tom Heaton has returned to Old Trafford and signed a two year deal with his first club Manchester United. (Official club announcement) (Photo by Naomi Baker/Getty Images) Photo: Naomi Baker