Wagner and Wilson announced their decisions via Twitter on Monday. By not hiring an agent, each retains the right to return to school.
Wagner and Wilson helped the Wolverines to a Big Ten Tournament title and an NCAA Sweet 16 appearance this past season. If they leave, it would be a hit for Michigan, which already loses seniors Derrick Walton and Zak Irvin.
The 6-foot-11 Wagner averaged 12.1 points per game as a sophomore and gave the Wolverines a big man who could step out and shoot 3-pointers. The 6-foot-10 Wilson, who also has two years of college eligibility left, averaged 11 points last season.
"I appreciate all of the support I continue to receive at the University of Michigan," Wagner said in the message on his Twitter account. "After talking with the coaches and my family, I have decided to enter my name to the NBA draft without hiring an agent."
The message on Wilson's account was similar: "I give glory to God each and every day for allowing me to be a part of the University of Michigan and our basketball program. With that being said, after discussing it with my family and coaches, I will be entering my name into the NBA draft without hiring an agent."
If Wagner and Wilson go to the NBA, Muhammad-Ali Abdur-Rahkman would be Michigan's only returning starter next season.