Sun Ke started his football career with second tier football club Jiangsu Sainty and by the 2008 season he would play in 22 league games and score two goals as he was part of the team that won the division title and premotion to the top tier. Within the top tier, Sun found it hard to gain significant playing time until the 2011 season when he started to establish himself as a first team regular, which soon culminated in his first goal in over two years when he scored in a league game on 14 September 2011 against Hangzhou Greentown that ended in a 2-0 victory.
Sun Ke was called up to the Chinese national team for the first team in March 2013. On 22 March 2013, Sun made his international debut in a 2015 AFC Asian Cup qualifying match in which China beat Iraq by a score of 1–0. On 21 July 2013, at the 2013 EAFF East Asian Cup, Sun Ke scored a dramatic game-tying goal to give China a 3-3 draw with Japan.