[1] Sinclair made his List A debut on 7 November 2019, for the West Indies Emerging Team in the 2019–20 Regional Super50 tournament.
[3] In July 2020, Sinclair was named in the Guyana Amazon Warriors squad for the 2020 Caribbean Premier League (CPL).
[6] In February 2021, Sinclair was named in the West Indies' limited overs squads for their series against Sri Lanka.
[11] In December 2023, he was selected in West Indies's squad for the test match series against Australia.
[14] In December 2024, he was picked in West Indies squad for the test match series in Pakistan.