Rudolph, an All-America candidate, suffered the injury in Saturday's 23-16 victory over Pittsburgh. He originally suffered a hamstring injury early in preseason practice and tried to play through it. He had 28 catches for 328 yards and three touchdowns in six games, including a 95-yard touchdown catch against Michigan.
Kelly said the injury, where tendons ''came off the bone'' will require surgery. Tyler Eifert, Mike Ragone and Jake Golic will replace Rudolph in the lineup.
''Certainly you lose one of the best tight ends in the country, that's a loss,'' Kelly said. ''One player is not going to stop what we do. Next-man-in philosophy -- Eifert, Ragone, Golic, tose guys are going to step up and play at a high level. We think they can. We have a lot of confidence in them.''