After his career was not proved very successful in the early years, Holt moved to the 2003/04 season to the English fourth division Rochdale AFC. The following season succeeded Holt ( 40 Spiele/17 goals), the breakthrough in his new club, which reached a ninth place in the table thanks to its goals. The start of the 2005/ 06 season was for the center forward again successful by scoring 14 goals in 21 games. Through his marksmanship he made Nottingham Forest attention to himself, which he still committed during the current season on 12 January 2006.
His new club, who won yet in 1979 and 1980 the European Champion Clubs' Cup, was now relegated to the third division. After a few successful start to his new team succeeded Holt (45 Spiele/14 goals) in the 2006/07 season a better personal result. Nottingham Forest missed in these two seasons to return to the second division, for 2007/ 08 was achieved by the runner-up behind Swansea City promotion to the Football League Championship. Holt could not convince this season and spent at the end of the season and a half months on loan at Blackpool FC. After the season he moved to Shrewsbury Town fourth division, in which Holt ( 46 Spiele/20 goals) was back again on track. Again he took the change to a more ambitious club and joined Norwich City on.
His new club played at this time in the third-tier Football League One and rose in the 2009/10 season, his talent as master to the second division on. Holt scored 24 goals in 39 games and had thus in the rise. In the following season, both the club and Holt were able to continue their success. Norwich City was in season 2010/11 runners-up behind Queens Park Rangers and thus increased after six years of absence, on to the Premier League. Holt was 21 goals in 45 games again the top scorer of his team, and was elected along with his teammate Wes Hoolahan in the PFA Team of the Year England's second league. In the season 2011/12 Holt presented his goalscoring in the Premier League proof: He scored 15 goals in 36 matches and helped his team advance to the league.
For the 2013/14 season he moved to the Premier League relegation Wigan Athletic and signed there a contract until 2016. During the winter break the same season first division side Aston Villa loaned him out until the summer. This Villa responded to the serious violation of Libor Kozak; Holt works at Aston Villa with his old coach Paul Lambert, under whom he had already played for Norwich City.
- 2007/ 08: Rise to the second division ( with Nottingham Forest )
- 2009/10: champion in the Football League One ( with Norwich City )
- 2010/11: promotion to the Premier League ( with Norwich City )