The Nittany Lions will play Nebraska, Maryland, and Ohio State twice.
Matthews scored nine goals on 16 shots in three tournament games.
Fleming's girlfriend, Alyssa Boyd, was pronounced dead at the scene.
Lee was a key reliever for the Nittany Lions last season.
The Cornhuskers outhit Penn State 8-2.
Pera coached under Mike Rhoades for two years.