[3] After his stint with the Philippine club, Cunliffe returned home to Guam to join Rovers FC.

He made his senior debut in the 2006 AFC Challenge Cup,[5] with his first match as a starting player on 3 April 2006 against the host nation, Bangladesh.

He made his first hat-trick for Guam in the 2013 EAFF East Asian Cup match against the Northern Mariana Islands, which helped them to win 3–1.

He scored another hat trick against Bhutan in a 2022 World Cup qualifier on 11 June 2019, which ended 5–0 for Guam.

He made his 50th international cap on September 4, 2018, in Guam's match against Macau at the 2019 EAFF Football Championship.