Knight noted that the Woods-Williams partnership lasted 13 years, which is uncommonly long in a profession where breakups are commonplace and job security is virtually non-existent for the bag carriers.
"It's right up there, I'd say it would be in the top 10 for the length of time they stayed together," he said.
"Thirteen years is a long time. A lot of guys last five to eight years but it varies a helluva lot."
Knight said the caddying fraternity was accustomed to seeking alternative employment and he himself has worked for a fair number of players in an 18-year career, among them another New Zealander Frank Nobilo, who he stood alongside for seven years in the 1990s.
"There was a stretch there (PGA Tour) earlier this year where among the top 20 players six or seven of their caddies were shuffled around.
"It was like musical chairs, but when the music stops there's always one guy who hasn't got a job," said Knight, who has been in the employ of Australian Aaron Baddeley since 2009, his second stint with the player.
Woods terminated his working relationship with Williams early this month, with the public announcement today ending one of the most successful partnerships the golfing world has seen.
Williams kept it quiet until today because he did not want anything to distract Australian Adam Scott at the British Open which ended on Monday.
In Woods' injury enforced absence, Williams has caddied for Scott at three tournaments and they will now extend that relationship.
The announcement marked the end of a 13-year association during which Woods dominated the game like few before him until his double life exploded into public view in late 2009, with news stories detailing his serial philandering with a series of women.
The split came amid a tumultuous period in Woods' career, which has spiralled downhill since his indiscretions became public knowledge.
Since then he has booked himself into a sex rehabilitation clinic, been divorced by his Swedish wife Elin Nordegren, parted way with noted coach Hank Haney and battled injury.
Williams was the next in the queue and his removal was the latest example of Woods severing ties with his past and follows an inactive period for the 14-time majors winner, who has been sidelined with leg injuries for much of this season.
Williams toted Woods' bag for 13 of those 14 major victories, as well as for 63 of his 71 PGA Tour titles, earning more than $US5 million from tournament income alone based on his being paid 7.5 percent of the player's prizemoney plus an annual retainer.
Williams said he was not upset by being fired and said he was proud to have been fired only twice in his 33 years as a caddie, by Woods and one-time Australian world No 1 Greg Norman in the 1980s.
"But I'm disappointed in the timing of it," he said.
"To be as loyal as someone can be, and with what one had to go through over the last 18 months...
"He informed me that he needed to make a change. After 13 years of loyal service needless to say this came as a shock."
Woods used his own website to confirm he and Williams would not be working together.
"I want to express my deepest gratitude to Stevie for all his help, but I think it's time for a change," Woods said.
"Stevie is an outstanding caddie and a friend and has been instrumental in many of my accomplishments. I wish him great success in the future."
Williams and Woods had previously been thought inseparable.
Woods' pursuit of Jack Nicklaus' record of 18 major titles has stalled, first when he took a break from the game in a failed bid to save his marriage, then by a knee injury which has prevented him from completing a tournament since the Masters at Augusta National in April.
He has not won a major since the 2008 US Open nor any tournament worldwide since 2009 and his world ranking has fallen to 20th.
Williams, 47, said he was ``very disappointed'' the partnership had ended.
"Given the circumstances of the past 18 months working through Tiger's scandal, a new coach and with it a major swing change and Tiger battling through injuries I am very disappointed to end our very successful partnership at this time.
"Having started my caddying career with Australian great Peter Thomson and working for Greg Norman in the '80s I am excited about the future working for another Australian."
When he began working with Woods in 1999 Williams planned to keep the relationship purely professional due to his past experiences with former Australian world No 1 Greg Norman, whom he considered he got too close to during the 1980s.
Despite his best intentions Williams in time befriended Woods and their bond was such that the American attended his wedding in New Zealand in 2006.
- NZPA
