A middleweight bout between former Strikeforce champ Gegard Mousasi (39-6-2 MMA) and Thiago “Marreta” Santos (13-4 MMA) served as the second bout of tonight’s UFC 200 card in Las Vegas.

Round one begins and Mousasi opens the fight with a leg kick. Gegard is pressing forward. He charges in with a right hand. Santos lands a counter punch. Mousasi has a high kick blocked. Gegard with a jab, Santos responds with a leg kick. Another nice jab from Gegard. He lands a solid leg kick on the Brazilian. Santos replies with a leg kick of his own. Mousasi with some big uppercuts. He uses the momentum to earn a takedown. He is working some strikes from half guard. Santos stands back up. Mousasi with a knee to the body. Gegard lands a trip and takes side control. He lands a big elbow from the top. Santos is able to get back to full guard. He tries to stand up. Mousasi lands a huge shot that drops the Brazilian. Another shot and this one is over!

Mousasi KO’s Santos at 4:32 of round one