UFC Fight Night 27 drew an announced attendance of 5,950 for a live gate of $355,290.
Condit ("Fight of the Night"), Kampmann ("Fight of the Night"), Brandon Thatch ("Knockout of the Night") and Zak Cummings ("Submission of the Night") earned $50,000 post-fight bonuses.
Betting favorites went 7-4 on the card.
Total fight time of the 12-bout fight card was 2:02:12.
Condit became one of just nine fighters in history to land 100-plus significant strikes in two separate UFC bouts. Condit landed 100 significant strikes against Kampmann, the most of any fighter on the card.
Condit's ninth finish in UFC/WEC welterweight competition ties Matt Brown for second most in 170-pound history. Matt Hughes leads the category with 10.
Condit's knockout at the 0:54 mark of Round 4 marked the earliest stoppage ever in a UFC bout with extended/championship rounds. The 29-year-old earned just the third-ever fourth-round stoppage victory in a non-title UFC bout.
Condit has been taken down at least once in 13 of his 14 career UFC/WEC fights. "The Natural Born Killer" has given up a total of 25 takedowns in his past three bouts.
Condit earned the ninth post-fight bonus of his Zuffa career, the second most among welterweights behind Chris Lytle (10). Condit has earned a bonus in six of his past seven bouts for a total of $390,000. His past three UFC appearances have been awarded "Fight of the Night."
Kampmann fell to 3-4 in his past seven fights and 3-2 in UFC main event bouts.
Kampmann's six completed takedowns were a personal best in his 17-fight UFC career.
Dos Anjos tied T.J. Grant for the second longest active winning streak in the lightweight division at five. Champion Benson Henderson leads the category with seven.
Court McGee improved to 2-0 since dropping to the welterweight division.
Robert Whittaker became the 17th fighter in UFC history to earn a 30-27 scorecard and still lose a decision.
Takeya Mizugaki earned the seventh win of his UFC/WEC bantamweight career, which is tied for the third most in the division's history.
Mizugaki passed reigning champ Dominick Cruz for the second most total fight time in UFC/WEC bantamweight competition at 2:54:20. Only Scott Jorgensen's 3:06:19 of total fight time ranks higher all-time among bantamweights.
Mizugaki passed Cruz for second most total strikes landed in UFC/WEC bantamweight competition with 937. Only Jorgensen's 945 total strikes rank higher all-time among 135-pound fighters.
Brad Tavares' four-fight UFC winning streak is third the longest in the middleweight division.
Brandon Thatch has finished his opponent by first-round knockout or submission in all 10 of his professional victories.
Papy Abedi and Justin Edwards suffered the first knockout losses of their professional careers.
Darren Elkins took sole possession of the UFC record for most featherweight wins with six. Elkins improved to 6-1 since his June 2011 debut in the 145-pound division.
Elkins' 100 total strikes landed gave him a total of 593 in his UFC career, passing Nam Phan for the most in UFC featherweight history. Elkins' 593 total strikes are fourth most in UFC/WEC featherweight competition.
Hatsu Hioki is on the first three-fight losing streak of his 35-fight career. All seven of Hioki's career defeats are by decision.
Zak Cummings earned the 10th D'arce choke victory in UFC history.
Roger Bowling vs. Abel Trujillo was the first UFC fight to be ruled a no-contest in the cage since Iuri Alcantara vs. Pedro Nobre at UFC on FX 8 in May.