Big Ten officials have rejected on-campus sites for a potential four-team national college football playoff, preferring to keep the Rose Bowl and other traditional bowls venues intact.

Athletic directors meeting as part of the annual spring Big Ten Joint Group on Tuesday, said many playoff details remain unsettled.

"There was a pretty strong consensus among the ADs that we'd like to have the playoff within the bowl system," Nebraska athletic director Tom Osborne said. "If you took them out of the playoff, it would pretty much destroy the bowl system."

A four-team Football Bowl Championship system is set to debut in the 2014 season, replacing a current No.1 vs. No. 2 BCS championship game that has rotated among the Sugar, Orange, Fiesta and Rose Bowl sites.