The former Penn State wide receiver recorded 98 catches, 1,658 yards, and 13 touchdowns from 2017-19.
Clifford was Penn State's leader in wins as a starting quarterback, passing yards, total yards, and passing touchdowns.
Castro-Fields appeared in eight games for the Commanders last season.
Amos played for Penn State from 2011-14.
The former Penn State wideout was signed as an undrafted free agent in 2023.
Oruwariye signed to the Jaguars' practice squad in October 2023.