Konan Niederhauser will leave the Nittany Lions after one year with the program.
The defending champions will play 16 matches against teams that made last year's NCAA Tournament in their 30-game schedule.
Penn State is 2-0 against the Stags all-time.
Throneberry is the seventh Penn State baseball player to enter the transfer portal.
The Nittany Lions will play Nebraska, Maryland, and Ohio State twice.
Take a look back as our photographers captured the Nittany Lions against the Big Red in the Final Four.