Rousseau's pressure stats in the playoffs is pretty good relative to his peers.
Also, I know there were some people saying that Rousseau gave up on the run play TD by Mahomes, if you look at the video it is the third clip and he absolutely did not give up on that play. By the time he had began to slow down his pursuit, Mahomes was clearing the goal line. I think people probably saw a bad angle or something but it is clear as day in that clip that he had no shot whatsoever of getting to Mahomes. He went inside but didn't bite hard and when he went to pursue Mahomes the RB was there to crackback block Rousseau.