In his first year as an amateur, Evans fought 27 times and reached the British Schools' final but was disqualified when the referee deemed a punch that floored his opponent was a low blow.

[3] In his second year, Evans met Patrick Cowdell in the National Association of Boy's Clubs' final but suffered a close points defeat.

On his return to Britain, Evans became the first Welsh Amateur Boxing Association (ABA) champion of the newly created light flyweight division.

Evans avenged his previous defeat by winning on points at the Double Diamond Club in Caerphilly but the victory proved unpopular with some authorities who had lined up Abrams as the captain of the British Boxing team at the event.

[7] Evans dominated Chilean Héctor Velásquez in the second round, claiming a 5–0 points victory in a performance that was described as "the purest boxing exhibition of the tournament.

[10] Despite being described as possessing "a most promising future" by The Guardian in the immediate aftermath of his Olympic defeat,[11] Evans chose to retire from boxing soon after the tournament at the age of 19.

Evans later worked at the club, coaching his younger brother Wayne during his professional career which culminated in a British bantamweight title defeat to Johnny Owen in 1978.