Shrewsberry is joining his father, Micah, in South Bend.
The combine will run from May 16 to 18 in Chicago, Illinois.
The Nittany Lions split yesterday's double header against the Hawkeyes.
The Nittany Lions split the doubleheader thanks to two big home runs in game two.
With the two wins over the Fighting Illini, the Nittany Lions move to eighth place in the conference.
The Nittany Lions could not keep up with Michigan's offense, led by five goals from Kaylee Dyer, and fell out of the Big Ten Tournament.