They do both make it into the top 10, but there are some big names who do miss out.
It takes Briggs just 2.71 rounds to knock his opponents out, despite having suffered six losses in his career.
The Cannon has won four of his last five fights inside a round, which is incredible for a fighter who has fought well into his 40s.
Wilder is second on the list with it taking him 3.12 rounds on average to achieve a knockout punch.
Just behind Wilder is Tommy Morrison, with 3.13 rounds being his quickest knockout ratio.
Morrison starred alongside Sylvester Stallone in Rocky V, but is also known for being a fierce puncher.
British legend Frank Bruno appears in fourth place with his knockout ratio being 3.35 rounds.
One of the most famous boxers ever and a man who beat Bruno twice makes up the top five and that is, of course, Mike Tyson.
‘The Baddest Man on the Planet’ struck immense fear into almost all of his opponents, with it taking his quickest knockout ratio being 3.38 rounds.
Lamon Brewster has a 3.48 ratio with Corrie Sanders following him on the list with 3.64.
Those ratios are slightly better than Herbie Hide, who appears in eighth position on the list.
Rounding off the top 10 are British fighter David Haye, whose knockout ratio was 3.75 rounds, and George Foreman, who took 3.86 rounds on average.
Perhaps more intriguing is where the fighters who didn’t make the top 10 list appear in the study.
Fifty five boxers were analysed and some of the best heavyweights of all time are nowhere near the top in terms of quickest knockout ratio.
The man considered the best heavyweight ever Muhammad Ali is bottom of the list with an 8.68 average.