QB - Fields, Willis
RB - Herbert, Cohen
WR - Mooney
TE - Kmet
OL - Jenkins, Borom, Whitehair
DL - Mack, Quinn, Goldman, Edwards, Gipson, Tonga
LB - Johnson
DB - Johnson, Jackson
K - Santos
These are the guys under contract for 2023, Whitehair, Goldman, Cohen, and Edwards are likely cut before then. So the thing is this team will be completely rebuilt by 2023 thru a combination of signing guys Eberflus wants to be here (Quan), the draft and FA.
If you really trying to contend by 2023, you are going to need some veteran leadership to help with that as you don't really want a completely young team trying to contend. Pretty much everyone above is going to be like 5 years in the league or less assuming the cuts I mentioned.
It is unlikely the draft picks we get from Mack and Quinn will be ready to make major contributions as early as 2023 and we will still be sitting on 100m in cap space given all the people that will be coming off the books. So we will not be short on money or resources to rebuild the team. What we will be short on is bonafide Pro Bowl caliber players and veteran guys in the locker room that exhibit the HITS principle that Eberflus wants to instill. That is why Mack and Quinn are important IMO. If they are still playing at an elite level, they are exactly the type of veteran leadership you will want on a team that is basically turning over 70% of its roster in 2 years.