1959-1962
1965-1967.
2002-2007.
Michigan defeated USC by a score of 22-14 on January 2, 1989 during the 1989 Rose Bowl Game.
Prior to the 2008 season, that was November 6, 2007 when Central Michigan defeated Western Michigan 34-31.
Through the 2008 season, that was November 12, 2005 when WMU won, 31-24, in Kalamazoo.
Technically, they never have, but from 1960 to 1963, they won 3 in a row, and then tied in 1963.
1999 was another common year where Michigan State beat Michigan twice in the regular season. But the question is when was the last time Michigan beat MSU twice in the regular season.
If Wisconsin defeats Michigan on November 20, 2010 it will be the first time that the Badgers have defeated both Michigan and Ohio State in a single season since 1981.
November 22, 2003 by the score of 35-21 in Ann Arbor.
Should Illinois defeat Michigan on November 6, 2010 it would be the first time they have defeated Michigan in three consecutive seasons since 1950, 1951, 1952, and 1953.
The 2008 season when Illinois won 45-20.
1965 (Alabama) and 1966 (Notre Dame) they spilt the national championship and in 1962 they won it outright.