Morgan tweaked his hamstring at the end of training camp, which limited him early in the season.[10][11] Morgan is credited with starting the second game against Notre Dame on September 10,[3] however, he struggled with his hamstring in the rivalry game.[12] Brandon Hawthorne started the next five games. After seven games and a bye week, Morgan replaced Hawthorne as the starting weak-side linebacker based on superior performance.[13] In announcing Morgan's promotion to the starting lineup, head coach Brady Hoke said, "Desmond's got a great future. He's doing a lot of good things. We're excited about him."[14] In his second career start on October 29, 2011, against Purdue, he had a team-high nine tackles.[10][15] Morgan established career highs with 10 tackles in both of the final two games of the season: he posted 5 solo (including his only quarterback sack of the season) and five assists on November 26 in The Game against Ohio State and then he had seven solo tackles and three assists in the January 3, 2012 Sugar Bowl against Virginia Tech.[16] For the season, he earned 2011 Big Ten All-Freshman team recognition from both ESPN.com and BTN.com as well as 2011 College Football News All-Freshman honorable mention honors.[17][18][19]
2012 season
Morgan missed the September 15, 2012, game against Massachusetts due to injury.[20]
On October 13, 2012, Michigan designated Gerald R. Ford's former jersey, No. 48, as a Michigan Football Legend Jersey. Morgan was honored as the first recipient of the Ford legend jersey, switching from the No. 44 jersey to No. 48.[21][22] He earned Academic All-Big Ten recognition in 2012.[23]
2013 season
In week 3, against Akron during a third down and 1 goal line stand, Morgan made a key tackle for a loss in the final 20 seconds to preserve the 28–24 win.[24][25] In the fourth quarter of the fourth game against Connecticut on September 21, Morgan made a one-handed interception to preserve a 24–21 victory.[26][27] Morgan was named Athlon Sports Big Ten Defensive player of the week.[28][better source needed]
Morgan was granted a fifth year of eligibility after the NCAA approved his medical hardship waiver.[30] Through the first nine game of the 2015 season, Morgan was Michigan's leading tackler with 57 total tackles.[31] Following the 2015 Big Ten Conference football season, he was an All-Big Ten honorable mention selection.[32][33] He won the 2015 Roger Zatkoff Award as the team's top linebacker. He finished his career as a three-time Academic All-Big Ten honoree, and Morgan was also voted to the 2015 CoSIDA Academic All-District First Team selection.[2]