On 29 September 2012, Dhiego Martins scored in stoppage time from an inch-perfect cross from Sealy, helping the club beat rivals Kitchee 1–0.

Sealy scored his first league goal for South China against Yokohama FC Hong Kong on 15 February 2014.

On 27 December 2015, South China announced that Sealy had signed with Chinese Super League club Changchun Yatai on a five-year contract.

[7] On 19 January 2018, Tai Po announced that Sealy had signed with the club, returning to Hong Kong after two years abroad.

[8] On 22 July 2018, it was reported that Sealy had left Tai Po for fellow Hong Kong Premier League club Pegasus.