The Big Ten's head of officials expressed remorse Friday about a pair of controversial calls in Penn State's overtime loss to Ohio State last fall and said they helped motivate changes in replay procedure.

"We kicked those calls," Carollo told the Allentown Morning Call. "I'm not happy with it, I'm not flippant about it, but I'm disappointed about it. They were pretty critical calls for Penn State."

Early in the Nittany Lions' eventual 31-24 loss to the Buckeyes in Beaver Stadium, officials ruled a Christian Hackenberg pass had been intercepted by Vonn Bell even though TV replays showed the ball had hit the ground. Carollo said Friday the replay booth at the time was receiving only one feed -- the overhead sky camera -- and officials didn't have enough evidence to overturn the call.

Carollo told the newspaper that several replay mechanisms were instituted as a result of that game, including the installation of a television in every Big Ten replay booth the following weekend.

"Everybody in the world knew that the ball wasn't intercepted by Ohio State, and everybody in the stadium knew it," Carollo told the Morning Call. "If something like that ever happens again, at least we can look at the television and we'll know the problem."

Ohio State also benefited when Sean Nuernberger's 49-yard field goal just before the half came well after the play clock had expired. Carollo said that call was the result of an official's error; he had been counting the number of players on the field.

Carollo met with Penn State coach James Franklin and his staff in Philadelphia on Thursday -- the coaches were in the city on their annual retreat -- but the coach declined to get into specifics or whether the Ohio State game had been brought up.

"He came out to talk to us about new rules, points of emphasis, and I'll leave it at that," Franklin said during Big Ten Media Days.