QB Mike Wright has entered the portal after redshirting last season and a stint at WR in spring ball.
The Wildcats offered dual-threat QB Israel Abrams from Lombard (Ill.) Montini Catholic during his visit on Tuesday.
Johnson was Northwestern's top returning receiver with 176 career receiving yards.
There were 14 Power Four commitments over the weekend, including Northwestern pledge, CB Joshua Sims.
Northwestern offered WR Justin Johnson, a 2027 prospect in their backyard at Evanston Township High School.
