The outside hitter joins the Nittany Lions with two years of eligibility remaining.
The Lady Lions scored just 18 points in the first half.
Deion Barnes will immediately assume offensive/defensive analyst and analytics coordinator duties with the promotion.
The Nittany Lions fell to No. 9 after being swept by Michigan over the weekend.
Matthews is the first player to verbally commit to the Nittany Lions' Class of 2025.
Miles Sanders' two-touchdown day highlighted the performances for Penn Staters during the NFL's Championship Sunday