May or may not have been "staged" in the premeditated sense but, Gegeshidze clearly just didn't want to continue and dove onto the canvas the first time he saw a punch that he thought he could a) slip while b) letting it be a close enough call that people might buy that it caught him. It may have been that he was mildly stunned by the grazing jab (he is, after all, a total tomato can and has been knocked out on the early side in over half his fights) and thought "fuck this". Or, the whole thing could be corrupt with Otto Wallin and his promoters in on it... Who knows?
If you watch the actual fight you will see body shots hurt him and he fell down on exhaustion alone before the stoppage early in the round ,it was a referee RTD in round two, crazy Teddy trying to show and sell some fabricated scenario here as if the fight was just over after a missed punch. Anyone thinking Wallin needs to fix a fight FoUR years ago vs a F level fighter is crazy to.