The flyweight turned professional in 1979 and went undefeated for 14 bouts. That was enough to secure a European title eliminator against Enrique Rodriguez Cal, but the Caerphilly man had to travel to Oviedo and he lost a 12-round points decision on the Spaniard’s home turf.
The setback was soon forgotten as Smart’s next fight would be his first shot at a professional title. He faced fellow Welshman Dave George at the Empire Pool, Wembley, with the vacant British flyweight crown on the line. Smart proved too strong for his Swansea rival, stopping him in six rounds.
After two non-title victories, the new champion was handed an uncomfortable first defence, against former British bantamweight champion Hugh Russell on the Northern Irishman’s home Belfast patch. The title changed hands after seven rounds when a badly swollen eye forced Smart to retire on his stool.
After 10 months out an unexpected second-round defeat to north Walian Ivor Jones followed, Smart then taking over a year out before getting back on the winning trail with a January 1986 bout against Rocky Lawlor.
But a trip to Dublin to face unbeaten, fast-rising Dave ‘Boy’ McAuley proved too much for the Caerphilly man. In fact, he would never win again.
The remaining 14 months of his career saw him fight seven times in venues as diverse as Le Cannet, Glasgow, Guyana, Calais, Swansea and Montpellier. But one draw and six defeats resulted, leaving Smart with a record of 17-10-2 when he eventually retired in April 1987.