Kearney (6-1 ½, 205, 4.47) was down for the count during part of his Saturday-through-Monday visit to Columbus.
"They said I had food poisoning," said Kearney, who was hosted by fellow Georgian Brandon Mitchell. "It had to be from something I ate before I got there. When I got there, I couldn't eat and I got sick. On Saturday, I got there, went to check out the stadium and went to the coaches' offices.
"I got to do everything that day but go out to eat and go out with the players that night."
Kearney, ranked right now as the No. 27 overall prospect in Georgia and as the nation's No. 37 linebacker by Scout.com, said that other than the illness he enjoyed his time at OSU.
"The whole trip was pretty good," he said. "I liked the campus and I liked the school."
"That shows me they think I can help them," Kearney said. "That's big time to see that. Coach Fickell is pretty cool. He was showing me the depth chart and what they have. He said they've put a lot of linebackers into the NFL. He's a young guy and I know he works hard at it.
"In terms of their depth chart, I saw they have two seniors (A.J. Hawk and Bobby Carpenter) coming back at outside linebacker. I know they have some more linebackers on the roster there. If I go there, I know I would have to work my way up. Those seniors have one more year."
Kearney visited South Carolina previously. He said his decision was "probably down to Georgia and Ohio State." He visits Georgia this weekend.
When asked if it would be hard to leave the state, Kearney said, "I am originally from Miami and we moved here when I got into my teens. It is something to consider to play near home."
Kearney tallied 93 tackles, 51 quarterback hurries and 18 sacks working mostly as a defensive end as a senior.
"I think my speed is my biggest asset," he said. "I think when I get to school, I'll be able to put on some weight and that will help me as I hit running backs and things like that."
Kearney holds a 2.5 GPA and scored an 820 on the SAT.