The Northern Ireland international soon settled into life at Elland Road following his summer 2015 move from Brentford, ending his debut campaign as United’s Players’ Player of the Year.
Dallas, who began his career with semi-professional homeland side Crusaders, became the first United player to feature in a major tournament for 10 years when he represented his country at Euro 2016.
The winger, a League One promotion winner with Brentford in 2014, signed a new three year contract with the Whites in August 2017.
Dallas is now nearing 150 appearances as he is currently on 142. Dallas scored four goals last season. Throughout the current squad Dallas has the second most appearances behind captain Liam Cooper.