St. Pierre defeats Alves by Decision.
Since making his organizational debut in 2004, Georges St-Pierre has collected eight decision victories inside the Octagon.
In 18 fights, St-Pierre has fought 53 rounds with 29 of those coming in his past six fights.
The four additional fighters that accompany the welterweight title holder on the list are former lightweight, welterweight and light heavyweight champions.
Matt Hughes (45-9 MMA, 18-7 UFC) is one of the most dominant champions in the history of the sport.
With the exception of four fighters, Hughes has also spent more time inside the Octagon than any of his peers.
Throughout his 25 UFC fights, Hughes racked up 3:43:12 worth of cage time.
While Hughes owns a handful of decision victories, the impressive part was his ability to take fights into the championship rounds and defeat his opponents.
Knockout victories over Hayato Sakurai, Carlos Newton, B.J. Penn and Renzo Gracie are prime examples of that.
Georges St-Pierre (22-2 MMA, 16-2 UFC) likely won't surprise anyone by making this list seeing as how he's fought 29 rounds in his past his six fights.
However, what is, is the fact that St-Pierre has won nearly every one of those 29 rounds.
St-Pierre's clocked 4:13:12 worth of Octagon time since defeating Karo Parisyan by decision at UFC 46 in 2004.
Up next for the welterweight champion is Carlos "The Natural Born Killer" Condit (27-5 MMA, 4-1 UFC) at UFC 137 on October, 29.
Penn Fights to a 3-round Draw against Jon Fitch.
B.J. Penn (16-7-2 MMA, 12-6-2 UFC) has spent 4:33:51 fighting world class fighters at both lightweight and welterweight throughout his UFC career.
He certainly didn't rack up very much Octagon time in the beginning of his career as his first three fights lasted seven minutes and 50 seconds over three rounds.
However, out of his past 12 fights, Penn has visited Rounds 3, 4 and 5 a total of nine times.
Penn's 21 second knockout of Matt Hughes in the final bout of their trilogy and 11 second knockout of Caol Uno at UFC 34 might not of added much time to his ranking on the all-time total fight time list, but they were definitely dominant performances.
The former two-division champion faces former Strikeforce veteran and ultra durable Nick Diaz (25-7 MMA, 6-4 UFC) at UFC 137 in Las Vegas on October, 29.
Randy Couture (19-11 MMA, 16-8 UFC) won championships in both the light heavyweight and heavyweight divisions during his time in the Octagon.
Couture's grinding style kept him inside the cage for 4:41:50 during his near 14 year career.
His five round victories over Tim Sylvia and Pedro Rizzo earned him 50 minutes towards his overall time.
Victories over Tito Ortiz and Brandon Vera were earned by way of decision and an August 2009 decision loss to Antonio Rodrigo "Minotauro" Nogueira contributed to his second place ranking.
Couture's a hall of famer and will go down in history as one of the most successful wrestlers turned professional fighters in UFC history.
Tito Ortiz (16-9-1 MMA, 15-9-1 UFC) is one of the greatest fighters to compete in the light heavyweight division.
His victories over Wanderlei Silva, Vitor Belfort, Vladimir Matyushenko, and Forrest Griffin has helped Ortiz rack up 4:42:38 worth of Octagon time.
During his light heavyweight championship run, Ortiz totaled 16 rounds of action.
Ortiz has six-fight and five-win streaks in his career, which lasted 21 rounds.
The former champion's next opportunity comes against Antonio Rogerio "Minotoro" Nogueira at UFC 140 in December.
All stats provided by FightMetric and are based on all UFC fights, including pre-UFC 28.
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