The Nittany Lions won the second most games in program history last season.
The class is headlined by the fifth-ranked recruit in the country.
"I look at the important qualities that a team needs this time of year to make a run, and we've got all those qualities."
Desdunes is the No. 51 player in the class of 2026.
The team added two outfielders, an infielder, and a catcher.
Drake Foley and Thomas Demps IV are the newest additions this National Signing Day.