Nico Collins says he has "unfinished business" at Michigan.
The receiver announced Sunday on Twitter he will return for his senior season.
"I have always believed in finishing what I started," Collins tweeted. "Coach (Jim) Harbaugh, Coach (Josh) Gattis and staff have helped me grow as a player and as a person. Another season with our coaching staff will allow me to continue to work on my skill and development which will prepare me for the next level.