The 6-foot-4, 230-pounder from Dwyer High School in Palm Beach, Fla., picked the Seminoles over Georgia, Alabama and LSU, Bill O'Leary said.
"Nick just felt most comfortable with FSU," O'Leary said, adding that his son has two cousins who already are students at the school. "We've been telling him all along, don't pick a school for just a coach, and we've watched the coaching shuffle for the past two years. You could get hurt on the second day of practice and then you're there for another four years. You have to want to be at that school.
"He did a lot of soul-searching before he made this decision."
Nick O'Leary, the grandson of golf legend Jack Nicklaus, officially visited Florida State last weekend. The tight end also had taken official visits to Wisconsin, LSU and Alabama.
"Florida State is getting a guy that runs great routes and he has the best set of hands," his high school coach, Jack Daniels, said. "When the ball's in the air he has great body control. Nick is a serious matchup problem for defenses ... The kid is very physical and very nasty out there."
Bill O'Leary was a former football player at Georgia, and Nick's mother also went there. The elder O'Leary acknowledged that it would have been nice to see his son playing for his alma mater, but said it's "always been Nick's decision and we're behind him 100 percent."
Bruce Feldman is a senior writer for ESPN The Magazine. Information from ESPN recruiting analyst Jamie Newberg was used in this report.