Luensmann has recorded five innings of work in six of his nine starts.
Wings President Greg Bibb said Owusu applied for another year of NCAA eligibilty.
Niederhauser was the Nittany Lions' first portal commit from the current cycle.
Owusu was the first Lady Lion drafted since Maggie Lucas in 2014.
The Nittany Lions blew a 8-0 lead in game two of the series.
Head coach Clarisa Crowell earned her 100th win at Penn State in game two.