That OL from Washington Tafai? who was supposed to be highly regarded and then rarely saw the field while the OL struggled most of the year would be my first guess.
He wasn't as good as Brosmer, but he was close. Stabilize the OL and either bank on Coleman ascending to that true #1 WR spot or find someone who can. If Taylor stays, great. If not, Ijeboi can be the guy.