With zero tackles against the Chiefs, Ngata registered his first zero-tackle contest since Dec. 13, 2009 against the Detroit Lions.
The thigh injury that limited the two-time Pro Bowl defensive tackle in practice last week bothered him at the outset of Sunday's game, but the thigh improved as the game wore on, Harbaugh said.
"I thought it did take him a while and early on, I think he wasn't quite as explosive maybe as he is other times," Harbaugh said. "But towards the end of the game, he was, and then we were able to get him out. But he came through it well. So it looks like he's in good shape."