Mouser spent 10 seasons with Campbell in Ames, Iowa, and spent the past two seasons as the Cyclones' play caller.
Before Clanton joined Campbell's staff in Ames, the Cyclones averaged just 108 yards per game.
Washington has appeared in at least 10 games a season in three years with the program.
Drayton joined the Nittany Lions this season.
Ioane secured his first All-Big Ten First Team selection in 2025.
Wheatley has started every game at safety for the past two seasons.