The sophomore's career day helped the Terps hold off the Nittany Lions.
The Terps are playing their first game in 12 days on Thursday.
The Terps are the highest-ranked Big Ten team.
Six Terps scored in double figures, led by Ashley Owusu's 19 points.
The Terps only used seven players in their Big Ten opener against Rutgers.
"I was able to do it all."
Mimi Collins scored a career-high 22 points to lead the Terps.
With Reese potentially out until March, Mimi Collins and Faith Masonius are being called upon to replicate her impact.
Diamond Miller was also named to the Big Ten Player of the Week Honor Roll.
Reese was the No. 2 recruit in the country entering the season.