Cornish is a four-star guard from Maryland, attending high school in South Carolina.
Cornish is the No. 77 prospect in the nation per 247Sports.
Aiken committed to Seton Hall, leaving the Terps with two open scholarships.
The Big Ten and NCAA tournaments were cancelled due to the coronavirus outbreak.
Cowan and Smith named all-Big Ten first team, Morsell earns honorable mention.
Four different Terps scored at least 15 points.
The Terps look to get back in the win column and clinch a share of the Big Ten title on Senior Day
“He’s given as much to this program as I have,” Cowan said.
Mathis played forward Jalen Smith and guard Darryl Morsell in high school.
Maryland is looking to bounce back from its first home loss of the season.