He came through the youth academy at Scottish Premiership side Rangers but failed to make a first team appearance, spending time on loan with Stenhousemuir and Greenock Morton.
[4] Dallas joined Scottish League Two club Stenhousemuir on loan from Rangers in March 2018[5] and made his professional debut on 7 April, scoring twice in a 1–4 win over Edinburgh City.
Having returned to Rangers and appeared on the bench in some matchday squads without making a debut for the Glasgow club,[6] on 21 January 2019 Dallas joined Scottish Championship side Greenock Morton on a loan deal until the end of the season.
[11] After scoring 12 goals in the National League with Weymouth on loan in the second half of the previous season, Dallas signed a new one-year deal with Cambridge United on 17 July 2021.
[18] For the second season in succession, Dallas was on the losing team in the National League play-off final as his Chesterfield side were defeated on penalties by Notts County following a 2-2 draw at Wembley Stadium.
[19] Following the conclusion of his loan with Chesterfield, Solihull announced they were offering Dallas a new contract, with manager Neal Ardley stating "Dallo has been brilliant for us in the last two seasons in which he's been top goalscorer in both.