Smith turned professional on 21 June 2008 and stopped Shaun Walton in the third round at the
National Indoor Arena in Birmingham. Like his brother he signed for
Warren's Sports Network
Smith vs. Simpson Smith became
Commonwealth featherweight champion after he edged a split decision over
John Simpson in
Glasgow on 4 September 2010. The judges' scorecards were 114–116, 116–114, 116–112 decision was announced following a gruelling battle. A re-match was held on 27 April 2011 with the vacant
British title also up for grabs. Smith once again won by majority decision with the judges scores reading 114–114, 115–114 and 118–112.
Smith vs. Selby Smith fought the Welsh challenger
Lee Selby on 17 September 2011, in a British and Commonwealth title defence at the
Olympia, Liverpool where he was stopped in the eighth round by a Selby left hand. Since losing to Selby, Smith fought Arpad Vass in the
Olympiahalle in Munich, Germany on 18 February 2012 winning via KO in Round 1. On 2 March 2012 Smith fought Ben Jones at
The Troxy in London winning that fight via technical knockout in round one. On 1 June 2012 Smith fought for the third time in 2012 against Jose Luis Gratero at the
York Hall winning again this time on points over eight rounds. Smith was due to fight on 8 March 2013 on the undercard of Yaqub Kareem v Paul Butler at the Liverpool Olympia however the fight was rescheduled to 12 April 2013. On 8 April 2013 Frank Warren confirmed that the event had been cancelled. Smith fought for the first time in 13 months on 28 June 2013 against Eddie Nebitt of
Belfast at the Liverpool Olympia and won via knockout in round one. In his next fight on 17 August 2013 against Gary Buckland at the Motorpoint Arena in
Cardiff, Smith won the British super-featherweight title after he knocked out Buckland in round five.
Promotional change In October 2013, Smith announced he was breaking his contract with Frank Warren and signing with
Eddie Hearn's Matchroom Boxing. Warren took action through the courts and with the British Boxing Board of Control against Smith's contract termination. On 31 October 2013 Smith was ordered by the British Boxing Board of Control to fight on 7 December 2013 in Liverpool under the Frank Warren promotion, Smith refused and relinquished his belt, the following day Smith was suspended by the BBBoC pending further investigation into his and Eddie Hearn's conduct in the switch. On 15 November 2013 Smith was handed back his licence by the BBBoC and his first fight under Matchroom promotions was confirmed to be against Sergio Manuel Medina on the undercard of the Carl Froch v George Groves at Manchester's Phones 4u arena on 23 November 2013, Smith won the fight via knockout in round eight and won the vacant WBC International Silver super-featherweight title.
Smith vs. Sosa Smith challenged
WBA (Regular)
super featherweight champion
Jason Sosa at
Salle des Étoiles in
Monte Carlo, Monaco, on November 12, 2016. He lost via unanimous decision with the ringside judges' scorecards reading 117–110, 116-112 and 116–111.
Smith vs. Vargas On 17 August 2017, Smith fought
Francisco Vargas, who was ranked #2 by the WBC at super-featherweight. Vargas won in the ninth round via a technical decision after the fight was stopped due to an ear injury suffered by Smith. ==Professional boxing record==