Rosser made his debut for the Steelmen as a then 17-year-old in 2016. He scored the decisive try in their Principality Premiership Play-off semi-final victory against Llandovery and went on to be a member of the victorious Ebbw Vale side which swept away Pontypridd in the Premiership final at Sardis Road.
In January 2017, he was included in the Wales U20 squad for the U20 Six Nations.
(LS January 31, 2017)
|2016 - present|
|2017 - present|
|2016 - 2017|