Did you look at the 2020 or 2021 depth charts? Because Anzalone was here until 2020 and CJGJ was here until 2021. And CJGJ was a starter in the Slot which often times does not really show up on the published depth chart.
Edit: And by the way, Anzalone was put on IR in mid-September of 2019 which is why he isn't listed as a starter in 2019 and why he only played 2 games that year.