Alleyne represented the West Indies under-19s at the 2012 Under-19 World Cup in Australia, scoring 52 against India in the opening match of the tournament.
[1] The previous year, playing against Australia in an under-19 Test match, he had scored a century, 106 from 136 balls.
[2] Alleyne made his first-class debut during the 2012–13 Regional Four Day Competition, playing for the Combined Campuses against the Windward Islands.
[4] In the 2012–13 Regional Super50, played later in the year, Alleyne scored 158 runs in three matches, including 58 on debut against Guyana and 99 in the semi-final against Trinidad and Tobago.
[5] In November 2016, Alleyne made his first-class debut for Barbados, scoring 19 and 84 in a match against the Leeward Islands in the 2016–17 Regional Four Day Competition.