There he earned many honors and achievements, including being named All-State and the title of EA Sports junior player of the year.

[8] By graduating high school early, he was able to attend the 2005 Rose Bowl and participate in 2005 Spring football practice.

[12] In the end Grady made two starts at tailback,[10] and was one of only six freshman to have played for the 2005 Michigan Wolverines football team.

[13] In 2006, he entered the season as Hart's primary backup,[14] ahead of senior Jerome Jackson, freshmen Brandon Minor, and Carlos Brown on the depth chart.

[16] As the season progressed, he remained second on the depth chart,[17] seeing limited playing time due to injuries as well as starter Mike Hart being healthy and starting all thirteen games.

[20] In July 2008, Grady was pulled over while driving in Wyoming, Michigan with a blood alcohol content of .281, more than three times the state's legal limit.

[22][23] Grady began the 2008 season on suspension from the 2008 Wolverines, while Brown, Minor and freshmen Michael Shaw and Sam McGuffie fought for time.

[26][27] With both Brown and Minor nursing injuries,[28] Sam McGuffie was tentatively penciled into the starting position on the depth chart.

[31][32] On October 17, 2009, the two became the first pair of brothers to score a touchdown in the same game for Michigan as far as could be told by the school's record books.

[36] On November 26, 2010, Grady was arrested and charged again for driving under the influence after recording a .3 blood-alcohol level on a breathalyzer test.

The sentence included two years of probation, 80 hours of community service, random drug tests, confinement to the state of Michigan until given leave by the judge, and 180 days of car immobilization.