The rivalry, played nearly annually since 1978 and scheduled through 2031, instead became a casualty of Notre Dame's decision to pledge five games of its 12-game schedule to the Atlantic Coast Conference. Notre Dame bailed out of the rivalry for the three years after 2014. The schools had scheduled a two-year break in 2018-19. What happens after that, no one is prepared to say.

The Notre Dame-Michigan game will no longer signify the arrival of autumn, a task it has performed every September for a generation. The memory of Raghib Ismail's two kickoff returns for touchdowns for the Irish in 1989, or Wolverines kicker Remy Hamilton's 42-yard game-winning field goal in 1994, or the craziness of the final minute of last year's game, will fade in importance.

If you are a college football fan who considers those memories to be manna from heaven, then the announcement by Notre Dame on Tuesday is a heartbreaker. But if you sit where Notre Dame athletic director Jack Swarbrick sits, you may understand why Michigan is expendable. Once you set aside tradition and passion, Michigan doesn't offer Notre Dame anything that it can't get elsewhere.

Of course, tradition and passion are what separate college football from the other beasts in the American sports jungle. But Vegas will tell you that tradition and passion are two-touchdown underdogs to the athletic department balance sheet for a reason.

Of the remaining seven slots on the Notre Dame schedule, one will be filled by USC, Notre Dame's most storied rival. They will play their 84th game this season. One will go to Stanford, and not at all because Swarbrick graduated from Stanford Law School. Notre Dame likes the affiliation with Stanford (see brains, brawn) and playing the Cardinal means that the Irish will play a football game in California every season.

Notre Dame also will not turn its back on Navy, which kept the school alive during World War II by placing a V-12 training program there. Notre Dame shows its gratitude by playing the Midshipmen in perpetuity (and occasionally in Dublin).