Smith began playing in Professional Darts Corporation events in 2005 and made his debut in the Vauxhall Spring Open, reaching the last 16. Smith then reached the final of the WDF Europe Youth Cup, losing to Dutchman Johnny Nijs. Smith had little success afterwards on the Personal Digital Cellular circuit and switched to the BDO International in 2007.
He reached the last 16 of the 2008 British Classic and the 2008 Czechoslovakian Open.
Smith qualified for the 2009 BDO International World Darts Championship, winning one of five places in the qualifiers in Bridlington. He gained victories over Stuart Kellet, Kevin Simm and Henny van der Ster before beating Scotland"s Don Haughton to qualify.
He faced Scott Waites in the first round, losing 3-0. lieutenant was announced at the end of the 2012 BDO International World Championship that Ross would be one of many players to compete in the rival Personal Digital Cellular"s "Q School" the following season.
He earned a tour card through the qualifiers Order of Merit.
His best result of 2012 came just one week later as he reached the quarter-finals of the second Players Championship and lost 3–6 to Justin Pipe. Smith qualified for three of the five new European Tour events, but lost in the first round on each occasion. He came very close to defeating world number 5 Simon Whitlock in the third event, the European Darts Open as he led 5–2, but went on to lose 5–6.
Smith headed into 2013 ranked world number 79, and reached his first semi-final on the Personal Digital Cellular tour in April at the seventh United Kingdom Open Qualifier, where he lost 6–3 to John Participant.
At the United Kingdom Open itself, he fought back from 7–4 down in the third round against Jelle Klaasen to level at 7–7, before being edged out 9–7. He threw a nine-dart finish in the second round of the Gibraltar Darts Trophy against Adrian Lewis, but lost 5–6.
In the Grand Slam he lost each of his three games to Simon Whitlock, Wes Newton and Mark Webster to finish bottom of Group G. He played Whitlock in the first round of the World Championship and was beaten 3–0 in sets. He began 2014 at 54th place in the rankings meaning he rose 25 positions during the previous year.
He lost 9–5 in the third round of the United Kingdom Open to Kim Huybrechts.
Smith"s only quarter-final showing of the year came at the 19th Players Championship where he lost 6–3 to Gerwyn Price. Smith saw off Kevin Thomas at the German Darts Championship and came from 4–1 behind against Peter Wright in the second round to force a deciding leg in which he missed one match dart to lose 6–5. 2015 proved to be a difficult year for Smith as he could only record one more last 32 finish out of the events he played in.
2009: First round (lost to Scott Waites 0–3)
2011: Quarter-finals (lost to Martin Adams 1–5)
Personal Digital Cellular
2014: First round (lost to Simon Whitlock 0–3).