Willis started 25 games for Minnesota last season.
"Ed Conroy has been vital to our program's success on and off the court since he has been here," head coach Richard Pitino said in a statement. "He is a phenomenal recruiter and a terrific teacher of the game. He has been integral in the development of our big men over the years."
Robbins had a standout season with Drake in 2019, averaging 14.1 points, 7.1 rebounds and 2.9 blocks per game.
Raabe ranked eighth in the NCAA with a .463 batting average.
Two years removed from winning a Colorado state high school championship together, sophomore Jack Liffrig and freshmen Sam Ireland and Drew Stahl are all teammates once again — this time, for the Gophers baseball team.
Gophers redshirt sophomore guard Marcus Carr declared for the 2020 NBA Draft on Monday night.
Gophers' Daniel Oturu has declared for the NBA draft, per reports.
With its season cut short, the Gophers men's basketball team enters the offseason with a lot of uncertainty.