This is a little misleading. Nobody in the history of sports has beaten a team that finishes a season undefeated.There has been a lot of discussion on this site about Kelly's inability to beat good teams. He has never won a BCS game, major bowl, been to playoff and of course a national title. So for the fans that still doubt this take a look at the stat below which is Kelly's record vs teams that finished the year with 4 losses or less 10-18
4-loss teams: 4-4
• 3-loss teams: 3-3
• 2-loss teams: 2-6
• 1-loss teams: 1-4
• 0-loss teams: 0-1
Fortunately, for Kelly he has played the easiest 6 year schedule in ND history and has played few good teams compared to previous coaches. The percentages go even lower when non power 5 teams like Temple and Navy are excluded. Kelly owes a lot to Swarbrick for his crafty scheduling helping cover up Kelly's inability to coach his team up for big games
That said you certainly have to count these 3 games as big wins, 2011 MSU who's only other loss was to Wisky in the Big10 Champ. 2013 MSU, we handed them their only loss. 2012 OU in their house.
You are correct about our performance in major bowl games, not only have we never won but we have been embarrassed.