EDIT: So Notre Dame obliged us by doing their best impression of basketball season, and Michigan now leads, .7307 to .7306. Wolverine 247 is reporting it, but their numbers are way off. They're reporting .7324 to .7323. I have no idea how they came up with those numbers; they don't make sense at all. Even Notre Dame's preseason media guide reported their all-time percentage as .732 (with a preseason record of 892-313-42); there's no way a 1-3 record puts them at .7323.
EDITED AGAIN: Wolverine 247 has corrected their numbers.
A few MGoUsers have noted that Michigan can retake the lead from Notre Dame in all-time winning percentage tomorrow, if Michigan beats Penn State and Notre Dame loses to Duke. Anyone want to delve deeper into both the races for all-time winning percentage and number of wins?
The current records of the schools are:
Notre Dame: 893-315-42, 1250 GP, .7312
MICHIGAN: 928-331-36, 1295 GP, .7305
(Note that the NCAA figures a tie as half won and half lost.)
All-Time Best Winning Percentage:
Until 2004, for decades Notre Dame easily had the highest all-time winning percentage among all schools. I suspect that during most of that time, if Michigan was not #2, it was at least third or fourth on the list; the point-a-minute era gave Michigan a good head start over most schools, Crisler righted the ship a bit in the ‘40s, and then Bo came along.
Notre Dame first overtook Michigan in all-time winning percentage in 1920, as the Rockne Era was just ramping up and Fielding Yost was starting to slow down a bit at Michigan. The big day was October 23, 1920, when Michigan lost to Illinois and Notre Dame beat Valparaiso; Notre Dame slipped ahead that afternoon, .7917 to .7898, and didn’t look back for more than 80 years.
Flash ahead to the end of the 2003 season, when Notre Dame’s 84-year lead was shaved to just .0001 after Chris Perry and John Navarre beat Ohio State with Notre Dame not playing that day.
On opening day in 2004, Michigan took over the lead, .7461 to .7454, with a win over Miami (Ohio) and a Notre Dame loss at BYU. But the very next week in South Bend, Garrett Rivas kicked field goals instead of a rookie Chad Henne throwing touchdowns, and the unranked Irish upset the Wolverines 28-20. Notre Dame retook the lead, .7457 to .7454, and maintained that lead for three weeks. On October 2, Notre Dame lost to Purdue and Michigan won at Indiana to retake the lead .7461 to .7456; this time, instead of just a week, Michigan would hold a very thin lead for nine years.
December 28, 2013 was our next pivotal moment, with Michigan losing to Kansas State in the Buffalo Wild Wings Bowl and Notre Dame beating Rutgers in the Pinstripe Bowl. Notre Dame retook the lead .7330 to .7324, and that’s more or less where we are today.
If Michigan beats Penn State tomorrow and Notre Dame loses to Duke, Michigan will inch ahead of the Irish by the narrowest of margins, .7307 to .7306.
Looking ahead, if you’d easily like to predict the course of the percentages over the season, given the two schools’ number of games played and percentages of past wins and ties, a win these days raises the school’s percentage by about .0002. A loss lowers the school’s percentage by about .0006.
It’s fascinating to look at a graph of the two schools’ season-end winning percentages over the past 100 years:
The rise and fall over the century is nearly identical. Rockne took the lead over from Michigan and built it up. Both schools experienced similar drops in the 1930s until rising again in the Leahy and Crisler years. Both took dips again in the 1950s. Ara Parseghian and Dan Devine righted the ship for the Irish in the ‘60s and ‘70s, and Bo did the same for Michigan. The difference then was that aside from Lou Holtz’s uptick in the late ‘80s, Notre Dame experienced a slow but steady decline starting with the Gerry Faust years, while Bo, Gary Moeller, and Lloyd Carr continued slowly but surely to build the numbers for Michigan.
The highest winning percentage Michigan ever reached was .8228, on November 25, 1905. The Wolverines beat Oberlin at Regents Field that day, 75-0, in the last win of Fielding Yost’s amazing point-a-minute unbeaten streak. The next week Michigan would lose to Chicago 2-0 at Marshall Field in “The First Greatest Game of the Century” when Amos Alonzo Stagg had finally bought enough players to beat Yost (plug for John Kryk's fabulous and fascinating book: "Stagg vs. Yost: The Birth of Cutthroat Football").
Notre Dame’s highest ever winning percentage was .8221, reached on November 14, 1931 in a 20-0 win over Navy in Baltimore. The Irish would lose their next game at home to USC, 16-14.
So not only do the schools' historical rise and fall in percentage roughly match on the graph, but each school reached its historical apex at roughly .822, and could climb no higher.
Biting at the heels of Notre Dame and Michigan are (current percentages as of last weekend):
1. Notre Dame .7312
2. MICHIGAN .7305
3. Boise State .7254
4. Ohio State .7230
5. Oklahoma .7204
6. Alabama .7187
7. Texas .7105
Ohio State is particularly alarming on that list, given (1) the recent gaudy record juggernaut in Columbus that doesn't look like it's stopping anytime soon; and (2) a Michigan loss to Ohio State corresponds to a roughly .0008 swing in all-time percentage -- Michigan really needs to stop losing to the Buckeyes, obvs.
All-Time Number of Wins:
Michigan started playing football nine years before Notre Dame, and played more games than the Irish did in Notre Dame’s first few years. As of today Michigan has played 45 more games.
Michigan always had a commanding lead on Notre Dame in number of wins until the 1960s, when Bump Elliot’s lean tenure at Michigan coincided with Ara Parseghian’s reboot of Notre Dame’s program.
Notre Dame finally caught Michigan in all-time wins on November 24, 1967. On the day after Thanksgiving, Notre Dame won at Miami to tie Michigan’s 501 wins; Michigan lost the next day to Ohio State, and the teams would open 1968 tied.
1968 opened with Notre Dame beating Oklahoma and Michigan losing to California, for a ND one-win lead. The next week the tie was on again, with a Michigan win at Duke and a Notre Dame loss to Purdue. Bump’s last season was one of his best, and Michigan didn’t lose a game the rest of the way except to Woody Hayes’s national champs; 1968 finished with Michigan one win ahead, 509-508.
Bo kept that one-win lead through 1969, with the year finishing 517-516, advantage Good Guys.
Notre Dame would tie Michigan again at the end of the 1970 season, with a win over No. 1 Texas in the Cotton Bowl; 526-526.
Michigan finally pulled ahead for good in 1971; right away Michigan beat Northwestern for win #527 while Notre Dame didn’t play on opening weekend. Michigan’s 11-1 season vs. Notre Dame’s 8-2 put Michigan ahead 537-534. Notre Dame kept relatively close to Michigan until 1981, when ND’s 5-6 record really put them behind the 8-ball against Michigan’s 9-3.
As with winning percentage, in total wins Michigan was greatly helped by the Bo/Mo/Lloyd relatively steady hands at the wheel while ND foundered with Gerry Faust, Bob Davie, Tyrone Willingham, and Charlie Weis. And Bo’s record in the ‘70s was good enough to leave just about everyone in the dust, even Ara Parseghian and Dan Devine.
A few seasons back, before Texas fell off the cliff for a few years, the Longhorns briefly moved ahead of Notre Dame for #2 on the wins list.
Next up on the wins list behind Michigan and Notre Dame are (as of last weekend):
1. MICHIGAN, 928
2. Notre Dame, 893
3. Texas, 888
4. Nebraska, 883
5. Ohio State, 878
6. Alabama, 867
7. Oklahoma, 861