A broken finger sustained in a match against Ipswich Town in January 1998 saw Roberts fall out of favour with the club, resulting in a move to Millwall at the end of the 1997–98 season.

[3] Roberts played just eight times at The New Den when he suffered a recurrence of his finger injury which forced him to end his League career.

He spent seven months away from football, returning in 1999 with non-League side St Albans City, making his debut in a 1–0 defeat to Slough Town.

While playing in America, Roberts began wearing a splint inside his glove to solve his finger injury problem.

[9] In the 2006–07 season, Roberts was part of the side that achieved promotion to The Football League after finishing as champions of the Conference National, having missed out on two previous occasions, on goal difference to Boston United in the 2001–02 season before losing the Conference play-off final to Doncaster Rovers the following year.

[4] During his career, he won two full international caps as a substitute in matches against Republic of Ireland on 17 February 1993 and San Marino on 31 August 1996,[15] as well as being selected 30 times as backup goalkeeper to Neville Southall.

[16] He also became the first Welshman to be capped at both full and semi-professional level as he helped his country win the non-league 'Home International' series twice.

[20] He was appointed to Aitor Karanka's staff as goalkeeper coach of Birmingham City in October 2020,[21] and left at the end of June 2021.