Roberts made his NRL début in 2000 with the St George Illawarra Dragons, scoring 22 points in that match.

[citation needed] Roberts injured his knee at the start of the 2007 season and made his return in Round 3 against the Manly-Warringah Sea Eagles.

[citation needed] In October 2008, Roberts was released from the final year of his contract with the Roosters to take up a four-year deal with English Super League club Wigan Warriors.

During the Easter Monday game against Wakefield Trinity Wildcats at the DW Stadium, Amos suffered an injury to his knee ligaments after colliding with the post in the process of scoring his 12th try of the season.

"[6] In 2007, Roberts, along with South Sydney's Nathan Merritt, appeared in the music video for Anthony Mundine's Platinum Ryder single.