Toby Ezeonu, John Kerr, and Owen Rose stepped up with huge performances. The three combined for 49 kill, 14 blocks, two aces, and only three attack errors.
Kirwan was among the team's most productive players last season.
Saturday and Sunday's contests will still be played as scheduled and are set to begin at 4:30 p.m. on Saturday, April 13, and 1 p.m. on Sunday, April 14.
Allessie is a former All-American and All-Big Ten honoree.
Jack Posey and Kevin Parnham were key contributors on last year's team that reached the NCAA semifinal.
The Nittany Lions mercy-ruled Fairleigh Dickinson in a 4,902 program-record attendance.