The game will now take place at 10 a.m. on Thursday, May 26.
Hiatt is coming to the Nittany Lions as a graduate transfer after four years with Texas Tech.
Catcher Matt Wood earned All-Big Ten first-team honors and took home the 2022 conference batting title.
Washington was Penn State's head coach from 2007 to 2019, compiling a record of 209-169.
Booth, who spent four years at Penn State in the 1990's, has been serving as the Nuggets' general manager since 2020.
Defensive errors and a late-game collapse gave Penn State its second loss of its series against Illinois.