Penn State honored six seniors and two graduate students for Senior Day.
The Nittany Lions scored seven unanswered goals.
Janecke and Roberts combined for four points.
McKenna's 24 points ties him for fifth in the nation among freshmen in scoring.
The freshman forward has 18 points in 21 games this season.
The Nittany Lions have just six home games left this season, including one at Beaver Stadium.