Shane Carwin has never gone to the second round in any of his fights, he has KOed or Submitted all of his opponents in the first round.
His first fight lasted all of 2 minutes and 11 seconds, ending with a submission by punches against Carlton Jones.
Since that marathon bout Shane Carwin has (T)KOed Justice Smith in 31 seconds at Extreme Wars 3-Bay Area Brawl.
Carwin (T)KOed Rick Slaton in 49 seconds at ROF 30-Domination.
Next it was Sherman Pendergarst in 1 minute and 41 seconds at ROF 31 Undisputed.
Then in his UFC debut Shane Carwin (T)KOed Christian Welisch at UFC 84: Ill Will in 44 seconds.
Shane Carwin then (T)KOed Neil Wain in 1minute 31 seconds at UFC 89: Bisping vs. Leben.
Gabriel Gonzaga only lasted 1 minute and 9 seconds against Shane Carwin at UFC 96: Jackson vs. Jardine.
Then Shane Carwin put away Frank Mir in 3 minutes 48 seconds with a series of uppercuts that stunned Mir, and finished him off with some vicious punches from the ground and pound position to win the UFC Interim Heavyweight Championship at UFC 111 St-Pierre vs. Hardy. Carwin was also awarded KO of the Night.