The sophomore catcher will have three years of eligibility left.
Mizrahi did not appear in a game in two years with Penn State.
Warden is the third Nittany Lion to enter the transfer portal this spring.
In three years at Grand Canyon, Herr played in 51 matches for the Antelopes.
A 8-0 run in the second half shifted all momentum in the way of Penn State.
The Nittany Lions open their Big Ten Tournament run on Wednesday, May 21, against Washington.