Versatile defender who joined Millwall in the summer of 2009 having been released by SwindonTown.
The brother of Pompey striker Tommy, they both started their careers at Watford where Jack made a handful of appearances before moving on to the County Ground in 2005.
He established himself as a regular right back with the Wiltshire club, playing over 150 senior games before his departure to The Den where he soon found himself in the thick of the action, becoming a fixture in the side either at centre back or full back.
Having arrived at The Den, Jack immediately impressed with his versatility, filling a variety of defensive roles during an injury crisis.
Unfortunately, injury robbed him of a Play-Off final appearance in May 2010, and a succession of niggles limited his starts in 2010/11 during which he signed a new two-year contract.
Previous clubs: Watford, Swindon Town
Lions debut: v Southampton 8th August 2009