Ronda Rousey's electrifying knockout win of Alexis Davis was many things; scary, dominant, legacy-building all come to mind. While it wasn't quite record-breaking, it came pretty darn close.
Officially clocked at 16 seconds, Rousey tied for the second-fastest knockout in UFC title fight history. It tied Frank Shamrock's 16-second knockout win over Kevin Jackson at UFC Japan in 1997 where he won the inaugural UFC middleweight championship (which would later be renamed the light heavyweight championship).
I’m about to rewatch Rousey vs. Davis okay I’m done— Jeremy Botter (@jeremybotter) July 7, 2014
However, both Rousey and Shamrock find themselves one second slower than former UFC heavyweight champion Andrei Arlovski. "The Pit Bull" broke Shamrock's record for the UFC's fastest title fight when he knocked out Paul Buentello at UFC 55. The win was wrongly deemed controversial as Buentello seemed to unceremoniously pass out during a takedown attempt, prompting harsh booing from the crowd. In reality, however, Arlovski landed a short right hand that landed perfectly on his chin and rendered Buentello unconscious.
Frank Shamrock also occupies the fourth-place spot, which he secured with his 22-second knockout of Igor Zinoviev. Shamrock badly injured the Russian's back with a huge slam which would wind up ending the challenger's career.
Worth noting is that there have been numerous UFC fights that ended well under 15 seconds. Officially, Chan-Sung Jung, Ryan Jimmo and Todd Duffee hold the UFC record for quickest wins, each knocking out their foes (being Mark Hominick, Anthony Perosh and Tim Hague, respectively) in seven seconds. Unofficially, UFC President Dana White declared Duane "Bang" Ludwig the record holder, clocking his UFC Fight Night 3 knockout of Jonathan Goulet at six seconds (you can check out Bleacher Report's list of each of the UFC's 10 Seconds or Less Knockouts here).
For those that missed it, Rousey defeated Davis by landing a hard right hand that wobbled the Canadian BJJ player. From there, she tossed Davis with a head-and-arm throw, landed in side control and proceeded to rain down punches until Davis went limp.
The win further cemented Rousey's place among MMA's elite and served as a stern warning to her future opponents.