Penn State will head into the Big Ten Tournament in its lowest positioning of the season.
The victory secures Penn State's fourth consecutive conference title.
McKenna's record-shattering month featured an eight-point game.
Falling behind early in games has become a theme for the Nittany Lions.
Scruggs was drafted 62nd overall by the Houston Texans in 2023.
Penn State was down 3-0 in the first period.