Right tackle Phil Loadholt will get an MRI on his injured lower leg Sunday, but it looks like he is OK.
"They don't believe it's anything real serious," Zimmer said after speaking with the medical staff.
Loadholt went to the locker room during the first quarter to get his leg X-rayed. He returned after sitting out one series. Rookie free agent Austin Wentworth replaced him and was beaten for a sack, which led to a fumble by Matt Cassel that bounced out the back of the end zone for a safety.
Safety Jamarca Sanford, who is fighting for a roster spot, also left in the first quarter after suffering an undisclosed injury on special teams, but he did not return. Afterward, Sanford said he felt "good,” but he expressed frustration that the injury denied him an opportunity to make an impression.
"I'm upset, frustrated," he said. "Not being able to go because you get hurt. It's part of the game."
And cornerback Josh Robinson, who missed the first two preseason games with a hamstring injury, made his 2014 debut against the Chiefs, lining up as the third cornerback in the nickel package.
"I actually planned on letting him warm up then sitting him," Zimmer said. "Then I went up and asked him how he felt and he said he feels good. So I just wanted to get him about 10 plays to try to get him a little bit of game tempo in a game situation and have a little confidence on his hamstring. So I was glad to see that he sucked it up and went out there and played."