Educated at New Orleans S.S.S, Blommetjies made the South African Schools Academy team while representing Boland U18s in 2008.
Moving to the Bulls in 2009, Clayton played SA U20s and made his Vodacom and Currie Cup debut in 2010.
The fullback also had a stint with the BlitzBokke on the 2012 Sevens World Series but mainly represents the Bulls in Vodacom and Currie Cup.
Blommetjies signed a deal with Bloemfontein-based side the Free State Cheetahs to join them starting 1 August 2014.
He made his Super Rugby debut in 2015 against the Bulls, and went on to score 30 points in 24 appearances. After 4 years at the Cheetahs, he announced that from the 2018/19 season he will move to the Scarlets
Following three starts in six competitive appearances for Scarlets, Blommetjies signed a loan deal with Leicester Tigers as injury cover.
He made two appearances for the Tigers before returning to South Africa and linking up with the Cheetahs on a short-term deal after his contract was terminated at the Scarlets.
|Free State Cheetahs
|2014 - present|
|2015 - present|
|2014 - 2014|
|2010 - 2015|
|2018 - 2019|
|2019 - 2019|