[6] Portsmouth were relegated from the top flight after only one season, with Knight keeping a clean sheet in a 2–0 win over south coast rivals Southampton at The Dell one of the few highlights.
[9] Knight's testimonial match took place in 1995 with a South Coast Derby against Southampton played in front of 18,000 fans at Fratton Park.
[4] After resisting competition from Estonian international goalkeeper Mart Poom and being named Portsmouth's player of the season for two consecutive seasons during the mid-1990s,[6] Knight eventually found himself being phased out of the first team by first Terry Fenwick, and later Alan Ball, with the young goalkeeper Aaron Flahavan becoming first choice.
He started for Portsmouth against eventual winners Chelsea in the 4–1 FA Cup quarter-final defeat at Fratton Park in March 1997, and appeared 25 times during the 1998–99 season keeping five clean sheets, most notably in a 1–0 FA Cup win away at Premier League club Nottingham Forest.
[12] Knight made his final appearance at Fratton Park as a late substitute for Flahavan in a Football League Cup tie against Torquay United on 24 August 1999.
On 3 January 2000, at the age of 38, Knight played his last match for Portsmouth at Norwich City's Carrow Road, becoming the only player to appear for the club in four different decades.
In 2003–04, after injuries to Shaka Hislop and Harald Wapenaar, Knight was called on to the substitutes' bench for Portsmouth and was listed as a squad member, but was never actually called into action.Knights last competitive game was at Horndean when he came on to replace the injured Matt Cole [15][16] Known by the Fratton Park faithful as The Legend, Knight spent almost all of his 25-year playing career at Portsmouth, sometimes demonstrating world-class saving and acrobatics.
Following this, Knight was named goalkeepers' coach for the American Major League Soccer team FC Dallas in 2006.
Staying in the United States, he then ran football coaching clinics for B.E.S.T (British European Soccer Tuition) in the USA.