Jason Shackell is a tall left-footed centre-back from Stevenage who progressed through three years of Norwich's academy.

He signed a two year professional contract towards the end of January 2003. He became the first home-grown player to sign a long-term deal for five years. For though Aylsham's Lewis Blois was handed a one-year professional contract to prove his worth, Darel Russell was the last Colney product to sign for longer - way back in November, 1997.The hope is that the security of a two-year contract will allow Shackell to blossom into a regular member of Worthington's first-team squad. "The boy deserves the two years," said Worthington. "It takes the pressure off him. Rather than just having the 12 months, he's got 24 months to go and produce." Size, maturity and a good left foot are three good reasons why the teenager can now look forward to a professional career at Carrow Road. "He's a good size for a centre-half," said Worthington, with Shackell standing a good 6ft 2in tall. "Plus he's matured over the last 12 to 18 months, both as a player and as a young man. He's joined with the professionals in training and held his own very well and I wouldn't have any problem with putting him in if the situation arose."

Jason became the third Academy player, after Ian Henderson and Dean Sinclair, to make his first team debut during 2002/03 when he played against Derby in a 2-1 defeat on March 5th 2003 replacing Adam Drury at the last minute when Drury succumbed to a virus.

Shackell was appointed the club's captain for the 2007/8 campaign and signed a new contract in October 2007 keeping him at Carrow Road until 2010. He lost the captaincy to Mark Fotheringham after Glenn Roeder was appointed manager

In July 2008, he was the subject of a £1m bid from Wolves but this was rejected by Glenn Roeder as the Canaries only had 4 recognised defenders in their squad at the time of the enquiry.

On 1st September 2008, Jason finally moved to Wolves, signing a four year contract for a fee rumoured to be between £750,000 and £1million.

Shackell made a surprise return to Norwich on 10th February 2009 sgning on loan until the end of the season. he had played just 13 games for Wolves. He made his second debut for Norwich in the 1-0 defeat at Preston on 14th February 2009. He made 14 appearances for City whilst onloan but could not help City avoid relegatito League One following their 4-2 defeat to Charlton on 3rd May 2009

Shackell was loaned out again on 14th August 2009, joining Doncaster Rovers on an initial month-long loan. This was extended initially until the end of December 2009 and then aagin until the end of the 2009-10 season.

In mid-May 2010, Jason signed for Mark Robins' Barnsley, and became captain

At the end of the 2010/11 season, Shackell was linked with Burnley, Derby (who had two failed bids) and Portsmouth (who were due for talks over a £1million move). Jason eventually signed for Derby on 21st June 2011 on a three year contract for a fee believed to be in the excess of £1m