Galt oversaw performance enhancement regimens for Penn State's 31 varsity programs and worked directly with the football team.
Arrington and the remaining honorees are set to be inducted on December 6, 2022.
"Although much of my time in college was spent battling injury, my experience as a Penn State student-athlete was better than I could have ever imagined."
Brown is the fifth defensive back to join the Nittany Lions' highly touted 2022 recruit class.
Stoll has served as Penn State's starting long snapper since 2019.
Stout had an impressive final season in Happy Valley by handling nearly all of Penn State's special team duties.