The 6-foot-4, 281-pound Ryslik, a member of the 2015 class, was offered by Duke on Thursday.
"Personally, I think they're a program on the rise," Ryslik said. "They've had a strong showing this year and look very promising in the future. And they are the first to give me that chance."
"They're all asking me to come out on visits," he said. "They're all saying how urgent it is to come out on campus and talk to them. I'll be at Penn State for their (Nov. 16) game. Their coaches want to see me and they told me something good was going to come out of that. They want to get me on campus and see me in person."