Sage played on numerous occasions for the successful SARU Sevens Academy, and signed a SARU Sevens in late 2015.
After playing on the wing for the Ikeys in the Varsity Cup in 2015, Sage made his Springboks debut at the Cape Town Sevens the same year.
He was included in a 12-man squad for the 2016 Summer Olympics in Rio de Janeiro, where he was named as a substitute for their first match against Spain, the South Africa winning the match 24–0.
(LS Aug 2016)
|South Africa 7's
|2015 - present|
|2018 - present|
|2019 - present|
|2015 - 2017|